devops: use official (non RC) Python 3.11 version (microsoft#1612)

Author: mxschmitt

.github/workflows/ci.yml

@@ -84,13 +84,13 @@ jobs:
  python-version: '3.10'
  browser: chromium
  - os: windows-latest
- python-version: '3.11.0-rc.1'
+ python-version: '3.11'
  browser: chromium
  - os: macos-latest
- python-version: '3.11.0-rc.1'
+ python-version: '3.11'
  browser: chromium
  - os: ubuntu-latest
- python-version: '3.11.0-rc.1'
+ python-version: '3.11'
  browser: chromium
  runs-on: ${{ matrix.os }}
  steps: