ci: use slash in public url

.github/workflows/release.yml

@@ -29,7 +29,7 @@ jobs:
         # this is necessary for github pages where the site is deployed to username.github.io/repo_name and all files must be requested
         # relatively as favicon.ico. if we skip public-url option, the href paths will instead request username.github.io/favicon.ico which
         # will obviously return error 404 not found.
-        run: ./trunk build --release --public-url "${GITHUB_REPOSITORY#*/}"
+        run: ./trunk build --release --public-url /${{ github.event.repository.name }}
       - name: Deploy
         uses: JamesIves/github-pages-deploy-action@v4
         with: