Update default SDK version to 0.2.5-preview (microsoft#26095)

* Update README.md

* Update buildHelper.ts

* Update newSdkSqlProjectTemplate.xml

extensions/sql-database-projects/README.md

@@ -35,7 +35,7 @@ Learn more about the SQL Database Projects extension in the documentation: https
 
 ### General Settings
 - `sqlDatabaseProjects.dotnetSDK Location`: The path to the folder containing the `dotnet` folder for the .NET SDK. If not set, the extension will attempt to find the .NET SDK on the system.
-- `sqlDatabaseProjects.microsoftBuildSqlVersion`: Version of Microsoft.Build.Sql binaries used when building SQL projects that are not SDK-style SQL projects. If not set, the extension will use Microsoft.Build.Sql 0.2.0-preview.
+- `sqlDatabaseProjects.microsoftBuildSqlVersion`: Version of Microsoft.Build.Sql binaries used when building SQL projects that are not SDK-style SQL projects. If not set, the extension will use Microsoft.Build.Sql 0.2.5-preview.
 - `sqlDatabaseProjects.netCoreDoNotAsk`: When true, no longer prompts to install .NET SDK when a supported installation is not found.
 - `sqlDatabaseProjects.collapseProjectNodes`: Option to set the default state of the project nodes in the database projects view to collapsed. If not set, the extension will default to expanded.
 

extensions/sql-database-projects/resources/templates/newSdkSqlProjectTemplate.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build">
-  <Sdk Name="Microsoft.Build.Sql" Version="0.2.0-preview" />
+  <Sdk Name="Microsoft.Build.Sql" Version="0.2.5-preview" />
   <PropertyGroup>
     <Name>@@PROJECT_NAME@@</Name>
     <ProjectGuid>{@@PROJECT_GUID@@}</ProjectGuid>

extensions/sql-database-projects/src/tools/buildHelper.ts

@@ -56,7 +56,7 @@ export class BuildHelper {
 
 	public async ensureDacFxDllsPresence(outputChannel: vscode.OutputChannel): Promise<boolean> {
 		const sdkName = 'Microsoft.Build.Sql';
-		const microsoftBuildSqlDefaultVersion = '0.2.0-preview'; // default version of Microsoft.Build.Sql nuget to use for building legacy style projects, update in README when updating this
+		const microsoftBuildSqlDefaultVersion = '0.2.5-preview'; // default version of Microsoft.Build.Sql nuget to use for building legacy style projects, update in README when updating this
 
 		const dacFxBuildFiles: string[] = [
 			'Microsoft.Data.SqlClient.dll',