Bump Microsoft.AspNetCore.Mvc.Testing from 8.0.20 to 8.0.21

---
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] <support@github.com>

Author: dependabot[bot]

JacoAPITests/JacoAPITests.csproj

@@ -22,7 +22,7 @@
         <PackageReference Include="AutoFixture.AutoNSubstitute" Version="4.18.1" />
         <PackageReference Include="CSharpFunctionalExtensions.FluentAssertions" Version="3.6.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
-        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.20" />
+        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.21" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>