MAINTAINERS: update file

- Remove Vijay (no longer @ FB).
- Add Patrick, Amithash (same as meta-facebook).
- Sync from docs for s/IRC/Discord.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I15f2955485a84bcbab236b9acfbf00b931a42cc6
1 file changed