Fix tiny typo in ninimal resolution in setup docs (#139)

1280x1082 is not a [common resolution][1], so probably was meant to be 1280x1024.

 * [1]: https://en.wikipedia.org/wiki/List_of_common_display_resolutions

Author: puf

docs/intro/before-you-begin/setting-up-flutterflow.md

@@ -16,7 +16,7 @@ You can [**sign up**](https://app.flutterflow.io/create-account) via Apple, Goog
 The FlutterFlow application can be accessed from your browser or installed as a desktop app.
 
 ### General recommendations:
-- Use a screen that is at least **1280 x 1084** 
+- Use a screen that is at least **1280 x 1024** 
 
 ### Browser recommendations:
 - FlutterFlow works best on **Google Chrome**