8.0.x is not needed

Author: antonfirsov

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

@@ -125,7 +125,6 @@ jobs:
         uses: actions/setup-dotnet@v1
         with:
           dotnet-version: |
-            8.0.x
             6.0.x
             5.0.x
             3.1.x