Bump ReportGenerator from 5.1.5 to 5.1.6

Bumps [ReportGenerator](https://github.com/danielpalme/ReportGenerator) from 5.1.5 to 5.1.6.
- [Release notes](https://github.com/danielpalme/ReportGenerator/releases)
- [Commits](https://github.com/danielpalme/ReportGenerator/compare/v5.1.5...v5.1.6)

---
updated-dependencies:
- dependency-name: ReportGenerator
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

UnitTests/UnitTests.csproj

@@ -16,7 +16,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
-    <PackageReference Include="ReportGenerator" Version="5.1.5" />
+    <PackageReference Include="ReportGenerator" Version="5.1.6" />
     <PackageReference Include="System.Collections" Version="4.3.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">