Update .github/workflows/docs.yml

Co-authored-by: Kevin Grüneberg <[email protected]>

Author: kiwicopple

.github/workflows/docs.yml

@@ -8,7 +8,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v2
         with:
           python-version: 3.x