Update api/updater.md with a note about required nativeAllowList stri…

…ngs (#331)

* Update api/updater.md with a note about required nativeAllowList strings

* Update updater.md

---------

Co-authored-by: Shalitha Suranga <shalithasuranga@gmail.com>

docs/api/updater.md

@@ -9,6 +9,11 @@ third-party update services, operating system level services, or other binaries/
 Learn more about extensions with [this guide](../how-to/auto-updater).
 
 
+:::note
+For this API to work, you should add `"filesystem.writeBinaryFile"` to the [`nativeAllowList` field](../configuration/neutralino.config.json#nativeallowlist-string) of your `neutralino.config.json` file.
+:::
+
+
 ## updater.checkForUpdates(url)
 Checks latest updates from the given URL. The URL should return a valid Neutralinojs update manifest with
 `Content-Type: application/json` header. Throws `NE_UP_CUPDMER` for invalid manifests and `NE_UP_CUPDERR`