Rename cPanel plugin to GNIZA Backups

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cpanel/gniza/install.json

@@ -2,7 +2,7 @@
     {
         "type": "link",
         "id": "gniza",
-        "name": "gniza Restore",
+        "name": "GNIZA Backups",
         "group_id": "files",
         "description": "Restore files, databases, email, and more from gniza backups",
         "uri": "gniza/index.live.cgi",