fix typo (#4874)

Author: yihuiliao

packages/react-aria-components/docs/FileTrigger.mdx

@@ -190,7 +190,7 @@ A file trigger can accept multiple files by passsing the `allowsMultiple` proper
 
 To specify the media capture mechanism to capture media on the spot, pass `user` for the user-facing camera or `environment` for the outward-facing camera via the `defaultCamera` prop.
 
-This behavior only works on mobile devices. On desktop devices, it will open the file system like normal. [Read more about about capture](https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/capture).
+This behavior only works on mobile devices. On desktop devices, it will open the file system like normal. [Read more about capture](https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/capture).
 
 ```tsx example
 <FileTrigger defaultCamera="environment">