build fix

Author: GuyWhoKnowsTheGuy

.github/workflows/gh-pages.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
     - name: Publish with dotnet
       run: dotnet publish ./src --configuration Release --output build
     - name: Deploy to Github Pages