chore(nuget): Bump Microsoft.AspNetCore.Mvc.Testing from 8.0.0 to 8.0.21 (#17)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.Mvc.Testing
  dependency-version: 8.0.21
  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]

10xGitHubPolicies.Tests.Integration/10xGitHubPolicies.Tests.Integration.csproj

@@ -23,7 +23,7 @@
     <PackageReference Include="Respawn" Version="6.2.1" />
 
     <!-- ASP.NET Core Integration -->
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.21" />
 
     <!-- Dependencies -->
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="9.0.10" />