Update README.md

Signed-off-by: Zoey <[email protected]>

README.md

@@ -25,6 +25,7 @@ jobs:
 
       - name: push changes
         run: |
+          git add --force src/output.css
           git config user.name "GitHub"
           git config user.email "[email protected]"
           git diff-index --quiet HEAD || git commit -sm "tailwindcss-update"