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

Author: renovate[bot]

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
 
       - name: upload build artifact
         if: github.event_name == 'push'
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: .vitepress/dist