Add brand & untested metadata & update of notes

Author: rudu

openandroidinstaller/assets/configs/ginkgo.yaml

@@ -10,6 +10,7 @@ metadata:
   supported_device_codes:
     - ginkgo
     - willow
+  untested: true
   notes:
     - You should install Android 10 or newer ROM.
     - Be careful when choosing OrangeFox version, Android 12 & 13 ROM needs OrangeFox version code with `A12`, for example `R11.1_5_A12`. Android 10 & 11 ROM needs OrangeFox version code without `A12` (bellow on the page)