neomutt: update to 20211029.

2021-10-29  Richard Russon  <rich@flatcap.org>
* Features
  - Notmuch: support separate database and mail roots without .notmuch
* Bug Fixes
  - fix notmuch crash on open failure
  - fix crypto crash handling pgp keys
  - fix ncrypt/pgp file_get_size return check
  - fix restore case-insensitive header sort
  - fix pager redrawing of long lines
  - fix notmuch: check database dir for xapian dir
  - fix notmuch: update index count after `<entire-thread>`
  - fix protect hash table against empty keys
  - fix prevent real_subj being set but empty
  - fix leak when saving fcc
  - fix leak after `<edit-or-view-raw-message>`
  - fix leak after trash to hidden mailbox
  - fix leak restoring postponed emails

(wiz)