MAINTAINERS: update fscrypt git repo

MAINTAINERS: update fscrypt git repo

fscrypt.git is being renamed to linux.git, so update MAINTAINERS
accordingly.  (The reasons for the rename are to match what I'm doing
for the new fsverity repo, which also involves the branch names changing
to be clearer; and to avoid ambiguity with userspace tools.)

As long as I'm updating the fscrypt MAINTAINERS entry anyway, also:

- Move my name to the top, so that people bother me first if they just
  choose the first person.  (In practice I'm the primary maintainer, and
  Ted and Jaegeuk are backups.)

- Remove an unnecessary wildcard.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20230116233424.65657-1-ebiggers@kernel.org