api - fix docs

src/vs/vscode.d.ts

@@ -6471,7 +6471,7 @@ declare module 'vscode' {
 		 *   }
 		 * });
 		 *
-		 * const callableUri = await vscode.env.asExternalUri(vscode.Uri.parse(`${env.uriScheme}:://my.extension/did-authenticate`));
+		 * const callableUri = await vscode.env.asExternalUri(vscode.Uri.parse(`${vscode.env.uriScheme}://my.extension/did-authenticate`));
 		 * await vscode.env.openExternal(callableUri);
 		 * ```
 		 *