update readme

Author: damienbod

README.md

@@ -198,7 +198,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: 7.0.x
+          dotnet-version: 8.0.x
 
       - name: Restore dependencies
         run: dotnet restore