fixed .NET 6 version for RavenDB tests

Author: feO2x

.github/workflows/build-and-test.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 6.0.2
+        dotnet-version: 6.0.201
     - name: Restore Dependencies
       run: dotnet restore ./Code/Synnotech.Migrations.sln
     - name: Build Solution