Fix workflow

Update from deprecated version https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

Author: DogmaDragon

.github/workflows/deploy.yml

@@ -36,7 +36,7 @@ jobs:
       - run: |
           cd dev
           ../main/build_site.sh ../_site/develop
-      - uses: actions/upload-pages-artifact@v2
+      - uses: actions/upload-pages-artifact@v4
 
   deploy:
     environment: