ci: update update-css-referential.yml

Author: neilime

.github/workflows/update-css-referential.yml

@@ -22,7 +22,7 @@ jobs:
           php-version: 8.3
 
       - name: Generate CSS Referential
-        run: composer run-script generate-css-referential
+        run: composer run-script generate-css-referentials
 
       - name: Push changes and create pull request
         uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8