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

Author: renovate[bot]

.github/workflows/astro.yml

@@ -37,7 +37,7 @@ jobs:
         run: bun run build
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: dist