chore(deps): update actions/upload-pages-artifact action to v4

Author: renovate[bot]

.github/workflows/docs.yaml

@@ -44,7 +44,7 @@ jobs:
                 uses: actions/configure-pages@v5
 
             -   name: Upload GitHub Pages artifact
-                uses: actions/upload-pages-artifact@v3
+                uses: actions/upload-pages-artifact@v4
                 with:
                     path: ./build