fix

Author: fi3ework

website/docs/en/guide/features/esm.mdx

@@ -1,6 +1,6 @@
 import { Stability } from '@components/ApiMeta';
 
-# ESM Output
+# ESM output
 
 Rspack supports bundling ESM format output. By default, Rspack generates CommonJS-like output, but you can configure `output.module` to generate ESM format output.