Update pack-libs.yml

Author: crazywhalecc

.github/workflows/pack-libs.yml

@@ -132,7 +132,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: crazywhalecc/static-php-cli
-          ref: downloader-enhancement
+          ref: main
 
       - name: "Setup PHP"
         if: matrix.runner != 'ubuntu-22.04' && matrix.runner != 'ubuntu-22.04-arm'