Update managed-robots-txt.mdx

Author: 10075012-oss

src/content/docs/bots/additional-configurations/managed-robots-txt.mdx

@@ -1,4 +1,4 @@
----
+ok---
 pcx_content_type: reference
 title: robots.txt setting
 sidebar:
@@ -180,4 +180,4 @@ Google Search Console may occasionally report `Syntax not understood` for Conten
 
 ## Availability
 
-Managed `robots.txt` for AI crawlers is available on all plans.
+Managed `robots.txt` for AI crawlers is available on all plans.