Merge pull request #87946 from brettcannon/patch-2

Fix a grammatical mistake in a docstring

src/vs/vscode.d.ts

@@ -10014,7 +10014,7 @@ declare module 'vscode' {
 		export function getExtension(extensionId: string): Extension<any> | undefined;
 
 		/**
-		 * Get an extension its full identifier in the form of: `publisher.name`.
+		 * Get an extension by its full identifier in the form of: `publisher.name`.
 		 *
 		 * @param extensionId An extension identifier.
 		 * @return An extension or `undefined`.