chore(csharp): Bump Microsoft.SourceLink.GitHub from 10.0.202 to 10.0.203

---
updated-dependencies:
- dependency-name: Microsoft.SourceLink.GitHub
  dependency-version: 10.0.203
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

csharp/Directory.Packages.props

@@ -38,7 +38,7 @@
     <PackageVersion Include="Google.Cloud.BigQuery.V2" Version="3.11.0" />
     <PackageVersion Include="Microsoft.IO.RecyclableMemoryStream" Version="3.0.1" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
-    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.202" />
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.203" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="OpenTelemetry" Version="1.12.0" />
     <PackageVersion Include="OpenTelemetry.Exporter.Console" Version="1.12.0" />