Update files-changed.yml

Author: RelativeSure

.github/workflows/files-changed.yml

@@ -46,6 +46,9 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 3
+          ref: master
 
       - name: Set up Python
         uses: actions/setup-python@v5