fix typo

src/vs/vscode.d.ts

@@ -2398,7 +2398,7 @@ declare module 'vscode' {
 
 		/**
 		 * An optional set of characters that when pressed while this completion is active will accept it first and
-		 * then insert type that character. *Note* that all commit characters should have `length=1` and that superfluous
+		 * then type that character. *Note* that all commit characters should have `length=1` and that superfluous
 		 * characters will be ignored.
 		 */
 		commitCharacters?: string[];