Small tuning following #1248

Author: fcollonval

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
     - name: Base Setup
       uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
       with:
-        python-version: ${{ matrix.python-version }}
+        python_version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: python -m pip install -U jupyterlab~=3.0

.github/workflows/publish.yml

@@ -31,6 +31,8 @@ jobs:
 
       - name: Base Setup
         uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
+        with:
+          python_version: '3.10'
 
       - name: Install dependencies
         run: python -m pip install -U jupyterlab~=3.1 jupyter-archive