mail/mutt: Security update to 2.0.5

• Update to 2.0.5 with fix for CVE-2021-3181
• Changelog at:

https://gitlab.com/muttmua/mutt/-/raw/da5e328257fd56f3498158be9277f0d9d36801f9/ChangeLog

PR: 252930
Submitted by: Derek Schrock <dereks@lifeofadishwasher.com> (maintainer)
Reviewed by: osa (mentor)
Approved by: osa (mentor)
MFH: 2021Q1
Security: 387bbade-5d1d-11eb-bf20-4437e6ad11c4
Differential Revision: https://reviews.freebsd.org/D28309