Merge pull request #216 from sebp/dependabot/github_actions/actions/checkout-4

Bump actions/checkout from 3 to 4

Author: sebp

.github/workflows/tox-workflow.yaml

@@ -7,7 +7,7 @@ jobs:
     name: Build
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Run Tox
         uses: ./.github/actions/sphinx-build-all
       - name: Archive HTML documents