Update docs/toolhive/guides-registry/authorization.mdx

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: rdimitrov

docs/toolhive/guides-registry/authorization.mdx

@@ -98,7 +98,7 @@ authz:
 ```
 
 Claim values can be strings or arrays. When a JWT claim is an array (for
-example, `roles: ["admin", "writer"]`), the server checks whether any element
+example, `role: ["admin", "writer"]`), the server checks whether any element
 matches the required value. A rule with `role: "admin"` would match this JWT
 because `"admin"` is one of the array elements.