Mastodon has been incompatible with Ruby 2.5 for a few releases due to some dependencies, this just updates the Gemfile description to match that situation.
@@ -1,7 +1,7 @@
# frozen_string_literal: true
source 'https://rubygems.org'
-ruby '>= 2.5.0', '< 3.1.0'
+ruby '>= 2.6.0', '< 3.1.0'
gem 'pkg-config', '~> 1.4'
gem 'rexml', '~> 3.2'