[main] Bump Microsoft.Diagnostics.DbgShim in /eng/dependabot/nuget.org (#8108)

Bumps [Microsoft.Diagnostics.DbgShim](https://github.com/dotnet/diagnostics) from 9.0.607501 to 9.0.621003.
- [Release notes](https://github.com/dotnet/diagnostics/releases)
- [Commits](dotnet/diagnostics@v9.0.607501...v9.0.621003)

---
updated-dependencies:
- dependency-name: Microsoft.Diagnostics.DbgShim
  dependency-version: 9.0.621003
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

eng/dependabot/nuget.org/Versions.props

@@ -2,6 +2,6 @@
   <!-- Import references updated by Dependabot. -->
   <PropertyGroup>
     <!-- dotnet/diagnostics references -->
-    <MicrosoftDiagnosticsMonitoringShippedVersion>9.0.607501</MicrosoftDiagnosticsMonitoringShippedVersion>
+    <MicrosoftDiagnosticsMonitoringShippedVersion>9.0.621003</MicrosoftDiagnosticsMonitoringShippedVersion>
   </PropertyGroup>
 </Project>