Update misc_docs/syntax/decorator_this.mdx

Co-authored-by: Patrick Ecker <[email protected]>

Author: kevanstannard

misc_docs/syntax/decorator_this.mdx

@@ -6,7 +6,7 @@ summary: "This is the `@this` decorator."
 category: "decorators"
 ---
 
-The `@this` decorator may be used to model JavaScript functions that need a reference `this`.
+The `@this` decorator may be used to bind to an **external** callback function that require access to a `this` context.
 
 ### Example