Merge pull request canonical#17 from canonical/annecyh/update-github-…

…actions

Update github actions used in documentation-checks.yaml

.github/workflows/documentation-checks.yaml

@@ -59,18 +59,18 @@ on:
 jobs:
   docchecks:
     name: Run documentation checks
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     outputs:
       result_spelling: ${{ steps.spellcheck-step.outcome }}
       result_woke: ${{ steps.woke-step.outcome }}
       result_links: ${{ steps.linkcheck-step.outcome }}
       result_pa11y: ${{ steps.pa11y-step.outcome }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ inputs.python-version }}