fix: specify ref for checkout step in GitHub Actions workflow

Author: medyo

.github/workflows/develop.yml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          ref: develop
 
       - name: Set up Node.js
         uses: actions/setup-node@v4