add fetch all branches to workflow

Author: thorinaboenke

.github/workflows/publish-docs.yml

@@ -17,6 +17,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+
+      - name: Fetch all branches
+        run: git fetch origin '+refs/heads/*:refs/remotes/origin/*'
+
       - name: Set up uv
         uses: astral-sh/setup-uv@v5
         with: