Update to .NET 5 RTM

.github/workflows/dotnet-core.yml

@@ -16,10 +16,10 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.100-rc.1.20452.10
+        dotnet-version: 5.0.100
     - name: Install dependencies
       run: dotnet restore
     - name: Build
       run: dotnet build --configuration Release --no-restore
     - name: Test
-      run: dotnet test --no-restore --verbosity normal UnitTests/
+      run: dotnet test --no-restore --verbosity normal