Update messages.json
Update messages.json

- Some typos corrected
- "description" line moved behind "message" line in "message--getNotificationText--text-with-emoji" and "EmojiPicker--skin-tone"
- "GroupV2--member-privilege--demote--other--unknown" syntax corrected ("placeholders" was absent)
nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop