some fix

README.md

@@ -454,7 +454,7 @@ See the complete cmake file and how to link your own library [here](https://gith
 
 ## SDK Architecture
 
-At the heart of our SDK is, what we refer to as, [Azure Core](https://github.com/Azure/azure-sdk-for-c/tree/master/sdk/docs/core). This code defines several data types and functions for use by the client libraries that build on top of us such as an [Azure Storage Blob](https://github.com/Azure/azure-sdk-for-c/tree/master/https://github.com/Azure/azure-sdk-for-c/blob/master/sdk/docs/storage) client library and [Azure IoT client libraries](https://github.com/Azure/azure-sdk-for-c/tree/master/https://github.com/Azure/azure-sdk-for-c/blob/master/sdk/docs/iot). Here are some of the features that customers use directly:
+At the heart of our SDK is, what we refer to as, [Azure Core](https://github.com/Azure/azure-sdk-for-c/tree/master/sdk/docs/core). This code defines several data types and functions for use by the client libraries that build on top of us such as an [Azure Storage Blob](https://github.com/Azure/azure-sdk-for-c/blob/master/sdk/docs/storage) client library and [Azure IoT client libraries](https://github.com/Azure/azure-sdk-for-c/blob/master/sdk/docs/iot). Here are some of the features that customers use directly:
 
 - **Spans**: A span represents a byte buffer and is used for string manipulations, HTTP requests/responses, reading/writing JSON payloads. It allows us to return a substring within a larger string without any memory allocations. See the [Working With Spans](https://github.com/Azure/azure-sdk-for-c/tree/master/sdk/docs/core#working-with-spans) section of the `Azure Core` README for more information.