chore(deps): update dependency azure.identity to 1.21.0 (#132)

Author: devlead

src/Directory.Packages.props

@@ -4,7 +4,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="AsyncEnumerator" Version="4.0.2" />
-    <PackageVersion Include="Azure.Identity" Version="1.20.0" />
+    <PackageVersion Include="Azure.Identity" Version="1.21.0" />
     <PackageVersion Include="Dapper" Version="2.1.72" />
     <PackageVersion Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.3.0" />
     <PackageVersion Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="2.1.0" />