Update Mattermost to 8.1

Changelog: changed

Author: mvitale1989

config/software/mattermost.rb

@@ -18,10 +18,10 @@
 
 name 'mattermost'
 
-default_version '8.0.1'
+default_version '8.1.0'
 
 source url: "https://releases.mattermost.com/#{version}/mattermost-team-#{version}-linux-amd64.tar.gz",
-       sha256: '684d266e9deafe03c1203bd7e19ef65259000d1e7aa0978b44135ca164981f23'
+       sha256: 'd6efe0cdaa04a13b34ded521283951fcedb0632ac42a12682e4daf97e53c909d'
 relative_path 'mattermost'
 
 license_name = 'GITLAB-MATTERMOST-COMPILED-LICENSE.txt'