Uptime to dotnet 6 for pipeline

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: '3.1.x'
+        dotnet-version: '6.0.x'
     - name: Get version from tag
       run: |
         TAGVERSION=$(git describe --tags --abbrev=0)