Bump Azure.Identity from 1.11.4 to 1.12.0 in /src

Bumps [Azure.Identity](https://github.com/Azure/azure-sdk-for-net) from 1.11.4 to 1.12.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Identity_1.11.4...Azure.Identity_1.12.0)

---
updated-dependencies:
- dependency-name: Azure.Identity
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/GitHubConnector.csproj

@@ -24,7 +24,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.Identity" Version="1.11.4" />
+    <PackageReference Include="Azure.Identity" Version="1.12.0" />
     <PackageReference Include="Markdig" Version="0.37.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.1" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />