Update ReportGenerator to version 5.0.3

Author: 0xced

tests/Serilog.Formatting.Log4Net.Tests.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="FluentAssertions" Version="6.3.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
     <PackageReference Include="PublicApiGenerator" Version="10.2.0" />
-    <PackageReference Include="ReportGenerator" Version="5.0.2" />
+    <PackageReference Include="ReportGenerator" Version="5.0.3" />
     <PackageReference Include="Serilog" Version="2.10.0" />
     <PackageReference Include="Serilog.Enrichers.Environment" Version="2.2.0" />
     <PackageReference Include="Serilog.Enrichers.Thread" Version="3.1.0" />