update github action

Author: devhl-labs

.github/workflows/publish.yml

@@ -12,10 +12,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      # - name: Setup dotnet
-      #   uses: actions/setup-dotnet@v1
-      #   with:
-      #     dotnet-version: 6.0.0
+      - name: Setup dotnet
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: 9.0.0
 
       # Publish
       - name: CocApi - publish on version change