mail/mutt: upgrade 1.13.2 -> 1.13.3

• This is a bug fix release, fixing exit screen handling and a possible segv on imap-logout-all.

PR: 243304
Submitted by: dereks@lifeofadishwasher.com (maintainer)
Relnotes: https://marc.info/?l=mutt-users&m=157886764632256&w=2