Bump ReportGenerator (#4008)

Bumps [ReportGenerator](https://github.com/danielpalme/ReportGenerator) from 4.8.0 to 4.8.1.
- [Release notes](https://github.com/danielpalme/ReportGenerator/releases)
- [Commits](danielpalme/ReportGenerator@v4.8.0...v4.8.1)

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csharp/unit-testing-code-coverage/XUnit.Coverlet.Collector/XUnit.Coverlet.Collector.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
-    <PackageReference Include="ReportGenerator" Version="4.8.0" />
+    <PackageReference Include="ReportGenerator" Version="4.8.1" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>