Update dotnet-reportgenerator-globaltool to 4.8.5

Author: AArnott

azure-pipelines/publish-codecoverage.yml

@@ -12,7 +12,7 @@ steps:
   displayName: Download macOS code coverage results
   continueOnError: true
 - powershell: |
-    dotnet tool install --tool-path obj dotnet-reportgenerator-globaltool --version 4.2.2 --configfile azure-pipelines/justnugetorg.nuget.config
+    dotnet tool install --tool-path obj dotnet-reportgenerator-globaltool --version 4.8.5 --configfile azure-pipelines/justnugetorg.nuget.config
     Copy-Item -Recurse $(Pipeline.Workspace)/coverageResults-Windows/obj/* $(System.DefaultWorkingDirectory)/obj
     Write-Host "Substituting {reporoot} with $(System.DefaultWorkingDirectory)"
     $reports = Get-ChildItem -Recurse "$(Pipeline.Workspace)/coverage.*.cobertura.xml"