Update deploy-pages action version

Author: avillar

.github/workflows/validate-and-process.yml

@@ -244,4 +244,4 @@ jobs:
       - name: Deploy to GH Pages
         if: ${{ github.event.repository.has_pages && !inputs.skip-pages }}
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4