README: add upload feature

Author: philips

README.md

@@ -14,7 +14,7 @@ This plugin has four main features:
 
 - 📺 Copy an image from a Supernote via [screen mirroring](https://support.supernote.com/en_US/organizing-managing/1791924-screen-mirroring) into your current note with the "Insert Supernote mirror image" command ([demo video](https://youtu.be/Ih_NW-z_aLw))
 
-- ⬇️  Download files directly from your device via the Supernote [Browse & Access](https://support.supernote.com/en_US/Tools-Features/wi-fi-transfer) feature. ([demo video](https://www.youtube.com/watch?v=SEkp395hbBM))
+- ⬇️  Download & Upload files directly from your device via the Supernote [Browse & Access](https://support.supernote.com/en_US/Tools-Features/wi-fi-transfer) feature. ([demo video](https://www.youtube.com/watch?v=SEkp395hbBM))
 
 **Video Demo**