Merge pull request #5842 from MetRonnie/actions

GH Actions: limit tutorial workflow to Python 3.11

Author: oliver-sanders

.github/workflows/test_tutorial_workflow.yml

@@ -21,7 +21,7 @@ jobs:
   test:
     strategy:
       matrix:
-        python-version: ['3.7', '3']
+        python-version: ['3.7', '3.11']
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
@@ -31,7 +31,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install docs/tutorial dependencies
         uses: cylc/cylc-doc/.github/actions/install-dependencies@master