ci: downgrade upload-artifact and download-artifact from v4 to v3 in all three deploy workflows

.gitea/workflows/deploy-public.yml

@@ -38,7 +38,7 @@ jobs:
         run: tar -czf deepdrft-public.tar.gz -C DeepDrftPublic/publish .
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: deepdrft-public
           path: deepdrft-public.tar.gz
@@ -53,7 +53,7 @@ jobs:
       DEPLOY_HOST: ${{ github.ref == 'refs/heads/master' && 'prod.cerebellumsoftworks.com' || 'dch7.cerebellumsoftworks.com' }}
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: deepdrft-public