upgrading dotnet version for actions

Author: ssinno28

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Setup Dotnet
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: '6.0.x'
+        dotnet-version: '9.0.x'
 
     - name: Restore Solution
       run: dotnet restore UltimoScraper.sln