Update main.yml

Author: deadmann

.github/workflows/main.yml

@@ -44,7 +44,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Setup .NET Core SDK
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v1
         with:
           dotnet-version: '4.x' # or whichever version you need for .NET Framework
       - run: echo '${{ steps.stepid.outputs.dotnet-version }}'