use hugo extended

this apparently changes how the css toolchain works, and is recommended, idunno why it matters tho

.github/workflows/publish.yaml

@@ -26,6 +26,7 @@ jobs:
         uses: peaceiris/actions-hugo@v2
         with:
           hugo-version: "0.122.0"
+          extended: true
 
       - name: Build
         run: hugo --minify