fix: upgrade github actions target to .NET 9.0

Author: Dwarf1er

.github/workflows/publish.yml

@@ -38,7 +38,7 @@ jobs:
             - name: Setup .NET SDK
               uses: actions/setup-dotnet@v4
               with:
-                  dotnet-version: 8.0
+                  dotnet-version: 9.0
 
             - name: Restore Dependencies
               run: dotnet restore