Update dependency ReportGenerator to v5.3.8

Author: renovate[bot]

algorithm-exercises-csharp-test/algorithm-exercises-csharp-test.csproj

@@ -32,7 +32,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.4.3" />
     <PackageReference Include="MSTest.TestFramework" Version="3.4.3" />
-    <PackageReference Include="ReportGenerator" Version="5.3.7" />
+    <PackageReference Include="ReportGenerator" Version="5.3.8" />
   </ItemGroup>
 
   <!-- Exclude test project from coverage -->