fetch all history openapi workflow (#35923)

.github/workflows/openapi-decorate.yml

@@ -36,6 +36,11 @@ jobs:
 
       - name: Checkout repository code
         uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        with:
+          # In order to fail gracefully when a branch already exists
+          # in the "Create pull request" step, we need to be able
+          # to get all existing branches.
+          fetch-depth: 0
 
         # Check out a nested repository inside of previous checkout
       - name: Checkout rest-api-description repo