Merge pull request #262 from devlead/renovate/azure.identity-1.x

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

Author: devlead

src/Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="Azure.Identity" Version="1.20.0" />
+    <PackageVersion Include="Azure.Identity" Version="1.21.0" />
     <PackageVersion Include="Cake.Bridge.DependencyInjection" Version="2026.3.2.498" />
     <PackageVersion Include="Cake.Common" Version="6.1.0" />
     <PackageVersion Include="Cake.Testing" Version="6.1.0" />