FIX: Sort filelists to ensure consistant asset precompilation hash (#13393)

Dir.glob does not guarantee file order and can change when ran on different machines.
This means that running asset precompilation on the exact same codebase will output
different content hashes.

lib/i18n/backend/discourse_i18n.rb

@@ -38,7 +38,7 @@ module I18n
       end
 
       def self.sort_locale_files(files)
-        files.sort_by do |filename|
+        files.sort.sort_by do |filename|
           matches = /(?:client|server)-([1-9]|[1-9][0-9]|100)\..+\.yml/.match(filename)
           matches&.[](1)&.to_i || 0
         end