ci: update build output paths in GitHub Actions workflow

- Change git add command to target new build output directories
- Update paths from 'source/build/js' to 'source/js/build'
- Update paths from 'source/build/css' to 'source/css/build'

.github/workflows/build-and-commit.yml

@@ -40,7 +40,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          git add source/build/js source/build/css
+          git add source/js/build source/css/build
           # Check if there are any changes
           if ! git diff --cached --quiet; then
             git commit -m "ci: build and update source/build/js and source/build/css [skip ci]"