docs: minor spelling correction (#13771)

Author: dten

docs/guide/features.md

@@ -86,7 +86,7 @@ But a few libraries haven't transitioned to this new default yet, including [`li
 - [`jsxFactory`](https://www.typescriptlang.org/tsconfig#jsxFactory)
 - [`jsxFragmentFactory`](https://www.typescriptlang.org/tsconfig#jsxFragmentFactory)
 
-If migrating your codebase to `"isolatedModules": true` is an unsurmountable effort, you may be able to get around it with a third-party plugin such as [rollup-plugin-friendly-type-imports](https://www.npmjs.com/package/rollup-plugin-friendly-type-imports). However, this approach is not officially supported by Vite.
+If migrating your codebase to `"isolatedModules": true` is an insurmountable effort, you may be able to get around it with a third-party plugin such as [rollup-plugin-friendly-type-imports](https://www.npmjs.com/package/rollup-plugin-friendly-type-imports). However, this approach is not officially supported by Vite.
 
 ### Client Types