move github action to .Net 7

Author: damienleroy

.github/workflows/on-release-tag-main.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Setup .NET Core SDK
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 8.x.x
+        dotnet-version: 7.x.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build