net-im/matterhorn: Update 90000.1.0 => 90000.1.1

Changelogs:

• https://github.com/matterhorn-chat/matterhorn/blob/90000.1.1/CHANGELOG.md#9000011
• https://github.com/matterhorn-chat/matterhorn/compare/90000.1.0...90000.1.1

Approved by: haskell@ (alven@)
Approved by: yuri@ (Mentor)
Differential Revision: https://reviews.freebsd.org/D52995