undo github actions change

Author: CodeWithMa

Diff for: .github/workflows/ubuntu.yml

@@ -14,9 +14,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v1
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v1
       with:
         dotnet-version: 6.0.302
     - name: Build with dotnet