chore(deps): pin dependencies

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -19,10 +19,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4
 
       - name: Base Setup
-        uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
+        uses: jupyterlab/maintainer-tools/.github/actions/base-setup@affc83be6020d529b9368cd4d63e467877606600 # v1
 
       - name: Install JupyterLab
         run: python -m pip install -U "jupyterlab>=4.0.0,<5"