CI: Don't rsync --delete public/

Author: fushar

.github/workflows/main.yml

@@ -25,4 +25,4 @@ jobs:
         run: rsync -avzh --delete app/ root@${DEPLOYMENT_HOST}:/var/www/html/osn/app
 
       - name: Rsync public/
-        run: rsync -avzh --delete public/ root@${DEPLOYMENT_HOST}:/var/www/html/osn/public
+        run: rsync -avzh public/ root@${DEPLOYMENT_HOST}:/var/www/html/osn/public