Update docs.yml

Author: DerThorsten

.github/workflows/docs.yml

@@ -50,7 +50,7 @@ jobs:
       # upload to github pages
       ################################################################
       - name: Upload Pages artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: docs_build/mkdocs 
 
@@ -78,4 +78,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v3 # or specific "vX.X.X" version tag for this action
+        uses: actions/deploy-pages@v4 # or specific "vX.X.X" version tag for this action