Fix highlight line

Author: nabeelio

docs/developers/addons/publishing.md

@@ -40,7 +40,8 @@ your addon to its YAML entry:
 {
   "name": "Reports",
   "alias": "reports",
-  **"registry_id": "acme/reports",**
+  // highlight-next-line
+  "registry_id": "acme/reports",
   "description": "KPIs, route performance, scheduled exports.",
   "keywords": ["reports", "analytics"],
   "priority": 0,