update deploy-pages rev

Signed-off-by: Karl W. Schulz <[email protected]>

Author: koomie

.github/workflows/docs.yml

@@ -48,4 +48,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4