chore: bump github pages actions to latest versions

The upload-pages-artifact action was bumped from v3 to v4 and the
deploy-pages action from v4 to v5 in the deployment workflow.

Keeping these actions up to date avoids deprecation warnings in CI runs
and picks up any bug fixes or performance improvements from upstream.

Author: vidalvasconcelos

.github/workflows/deployment.yaml

@@ -26,10 +26,10 @@ jobs:
         uses: actions/configure-pages@v5
 
       - name: "Upload artifact"
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: 'public'
 
       - name: "Deploy to GitHub Pages"
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5