Use Python 3.12 for now

Author: hoxbro

.github/workflows/ipywidgets-bokeh-ci.yml

@@ -16,6 +16,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         node-version: [18.x]
+        python-version: ["3.12"]
 
     defaults:
       run:
@@ -66,7 +67,7 @@ jobs:
       - name: Install dev Python dependencies & Playwright browsers
         if: success() || failure()
         run: |
-          conda install --channel conda-forge -y pip python
+          conda install -y pip python=${{ matrix.python-version }}
           conda info
           python -m pip install --editable .[dev]
           python -m playwright install --with-deps