editors/emacs-devel: Update to 2024-06-01 snapshot, 9a2088bdd9

Commit log: https://github.com/emacs-mirror/emacs/compare/c85294a6132...9a2088bdd9
Event: BSDCan 2024
Sponsored by: The FreeBSD Foundation
Reviewed by: ashish (in person)
Differential Revision: https://reviews.freebsd.org/D45446