update dotnet version with github action

.github/workflows/dotnetcore.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@master
       with:
-        dotnet-version: 7.0.203
+        dotnet-version: 7.0.5
     - name: dotnet info
       run: dotnet --info
     - name: dotnet restore