Bump ReportGenerator from 4.3.8 to 4.3.9

Bumps [ReportGenerator](https://github.com/danielpalme/ReportGenerator) from 4.3.8 to 4.3.9.
- [Release notes](https://github.com/danielpalme/ReportGenerator/releases)
- [Commits](danielpalme/ReportGenerator@v4.3.8...v4.3.9)

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

Packages.props

@@ -16,7 +16,7 @@
     <PackageReference Update="GitVersion.Tool" Version="5.1.2" />
     <PackageReference Update="JetBrains.ReSharper.CommandLineTools" Version="2019.3.0" />
     <PackageReference Update="Nuke.Common" Version="0.23.4" />
-    <PackageReference Update="ReportGenerator" Version="4.3.8" />
+    <PackageReference Update="ReportGenerator" Version="4.3.9" />
     <PackageReference Update="Rocket.Surgery.Nuke.DotNetCore" Version="0.9.2" />
   </ItemGroup>
   <ItemGroup>