Update actions/setup-dotnet action to v4 (#131)

Author: renovate[bot]

.github/workflows/GenerateAsyncCode.yml

@@ -19,7 +19,7 @@ jobs:
         token: ${{ secrets.NHIBERNATE_BOT_TOKEN }}
 
     - name: Setup .NET
-      uses: actions/setup-dotnet@v2
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: 6.0.x