fix(pfd): master is main branch

Author: lvthillo

.github/workflows/auto-merge-dependabot.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          ref: main
+          ref: master
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3