Allow opening a PR against a branch

.github/workflows/upgrade-jupyterlab-dependencies.yml

@@ -35,26 +35,25 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+        with:
+          branch: ${{ inputs.branch || 'main' }}
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.11'
 
-      - name: Install required dependencies
-        run: |
-          python -m pip install jupyterlab
-          sudo apt-get install hub
-
       - name: Install Node
         uses: actions/setup-node@v2
         with:
           node-version: '20.x'
 
       - name: Install npm dependencies and build buildutils
         run: |
-          jlpm install
+          python -m pip install -e ".[dev]"
+
+          jlpm
           jlpm run build:utils
 
       - name: Check for new releases and update