Fix Rails/RootPathnameMethods cop (#31582)

lib/tasks/branding.rake

@@ -15,7 +15,7 @@ namespace :branding do
     output_dest  = Rails.root.join('app', 'javascript', 'images', 'mailer')
 
     # Displayed size is 64px, at 3x it's 192px
-    Dir[Rails.root.join('app', 'javascript', 'images', 'icons', '*.svg')].each do |path|
+    Rails.root.glob('app/javascript/images/icons/*.svg').each do |path|
       rsvg_convert.run(input: path, size: 192, output: output_dest.join("#{File.basename(path, '.svg')}.png"))
     end
 

lib/tasks/icons.rake

@@ -20,7 +20,7 @@ end
 def find_used_icons
   icons_by_weight_and_size = {}
 
-  Dir[Rails.root.join('app', 'javascript', '**', '*.*s*')].map do |path|
+  Rails.root.glob('app/javascript/**/*.*s*').map do |path|
     File.open(path, 'r') do |file|
       pattern = %r{\Aimport .* from '@/material-icons/(?<weight>[0-9]+)-(?<size>[0-9]+)px/(?<icon>[^-]*)(?<fill>-fill)?.svg\?react';}
       file.each_line do |line|

lib/tasks/repo.rake

@@ -98,7 +98,7 @@ namespace :repo do
     missing_yaml_files = I18n.available_locales.reject { |locale| Rails.root.join('config', 'locales', "#{locale}.yml").exist? }
     missing_json_files = I18n.available_locales.reject { |locale| Rails.root.join('app', 'javascript', 'mastodon', 'locales', "#{locale}.json").exist? }
 
-    locales_in_files = Dir[Rails.root.join('config', 'locales', '*.yml')].map do |path|
+    locales_in_files = Rails.root.glob('config/locales/*.yml').map do |path|
       file_name = File.basename(path, '.yml')
       file_name.gsub(/\A(doorkeeper|devise|activerecord|simple_form)\./, '').to_sym
     end.uniq.compact