fix upgrade action

Author: tschaume

.github/workflows/upgrade-dependencies.yml

@@ -61,7 +61,6 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-          cache: 'pip'
       - name: detect auto-upgrade-dependency branches
         id: changes
         run: echo "count=$(git branch -r | grep auto-dependency-upgrades- | wc -l | xargs)" >> $GITHUB_OUTPUT