Update external binding summary

Author: ryyppy

misc_docs/syntax/language_external.mdx

@@ -2,7 +2,7 @@
 id: "external"
 keywords: ["external", "javascript"]
 name: "external"
-summary: "This is the `external` language construct."
+summary: "This is the `external binding` keyword."
 category: "languageconstructs"
 ---
 
@@ -33,4 +33,4 @@ var root = Path.dirname("/User/github");
 * [Bind to JS Object](/docs/manual/latest/bind-to-js-object)
 * [Bind to JS Function](/docs/manual/latest/bind-to-js-function)
 * [Import From JavaScript](/docs/manual/latest/import-from-export-to-js#import-from-javascript)
-* [Bind to Global JS Values](/docs/manual/latest/bind-to-global-js-values)
+* [Bind to Global JS Values](/docs/manual/latest/bind-to-global-js-values)