[Docs] Fixing broken links (Azure#32191)

The focus of these changes is to update several broken links that were
flagged.

samples/AppSecretsConfig/README.md

@@ -255,7 +255,7 @@ In [ASP.NET Razor pages][aspnet_razor] as an example, you can then inject them i
 [dotnet_install]: https://dotnet.microsoft.com/download
 [identity_defaultazurecredential]: https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/identity/Azure.Identity/README.md#defaultazurecredential
 [identity_troubleshooting]: https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/identity/Azure.Identity/README.md#troubleshooting
-[keyvault_injection]: https://docs.microsoft.com/dotnet/api/overview/azure/microsoft.extensions.azure-readme-pre
+[keyvault_injection]: https://docs.microsoft.com/dotnet/api/overview/azure/microsoft.extensions.azure-readme
 [keyvault_limits]: https://docs.microsoft.com/azure/key-vault/general/service-limits
 [keyvault_overview]: https://docs.microsoft.com/azure/key-vault/general/overview
 [keyvault_references]: https://docs.microsoft.com/azure/azure-app-configuration/use-key-vault-references-dotnet-core

sdk/synapse/Azure.Analytics.Synapse.AccessControl/README.md

@@ -22,7 +22,7 @@ dotnet add package Azure.Analytics.Synapse.AccessControl --prerelease
 
 ### Prerequisites
 
-- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://account.windowsazure.com/Home/Index).
+- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account]https://azure.microsoft.com/account).
 - An existing Azure Synapse workspace. If you need to create an Azure Synapse workspace, you can use the [Azure Portal](https://portal.azure.com/) or [Azure CLI](https://docs.microsoft.com/cli/azure).
 
 If you use the Azure CLI, the command looks like below:

sdk/synapse/Azure.Analytics.Synapse.Artifacts/README.md

@@ -22,7 +22,7 @@ dotnet add package Azure.Analytics.Synapse.Artifacts --prerelease
 
 ### Prerequisites
 
-- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://account.windowsazure.com/Home/Index).
+- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://azure.microsoft.com/account).
 - An existing Azure Synapse workspace. If you need to create an Azure Synapse workspace, you can use the [Azure Portal](https://portal.azure.com/) or [Azure CLI](https://docs.microsoft.com/cli/azure).
 
 If you use the Azure CLI, the command looks like below:

sdk/synapse/Azure.Analytics.Synapse.ManagedPrivateEndpoints/README.md

@@ -24,7 +24,7 @@ dotnet add package Azure.Analytics.Synapse.ManagedPrivateEndpoints --prerelease
 
 ### Prerequisites
 
-- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://account.windowsazure.com/Home/Index).
+- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://azure.microsoft.com/account).
 - An existing Azure Synapse workspace. If you need to create an Azure Synapse workspace, you can use the [Azure Portal](https://portal.azure.com/) or [Azure CLI](https://docs.microsoft.com/cli/azure).
 
 If you use the Azure CLI, the command looks like below:

sdk/synapse/Azure.Analytics.Synapse.Monitoring/README.md

@@ -22,7 +22,7 @@ dotnet add package Azure.Analytics.Synapse.Monitoring --prerelease
 
 ### Prerequisites
 
-- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://account.windowsazure.com/Home/Index).
+- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://azure.microsoft.com/account).
 - An existing Azure Synapse workspace. If you need to create an Azure Synapse workspace, you can use the [Azure Portal](https://portal.azure.com/) or [Azure CLI](https://docs.microsoft.com/cli/azure).
 
 If you use the Azure CLI, the command looks like below:

sdk/synapse/Azure.Analytics.Synapse.Spark/README.md

@@ -24,7 +24,7 @@ dotnet add package Azure.Analytics.Synapse.Spark --prerelease
 
 ### Prerequisites
 
-- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://account.windowsazure.com/Home/Index).
+- **Azure Subscription:** To use Azure services, including Azure Synapse, you'll need a subscription. If you do not have an existing Azure account, you may sign up for a [free trial](https://azure.microsoft.com/free/dotnet/) or use your [Visual Studio Subscription](https://visualstudio.microsoft.com/subscriptions/) benefits when you [create an account](https://azure.microsoft.com/account).
 - An existing Azure Synapse workspace. If you need to create an Azure Synapse workspace, you can use the [Azure Portal](https://portal.azure.com/) or [Azure CLI](https://docs.microsoft.com/cli/azure).
 
 If you use the Azure CLI, the command looks like below: