Merge pull request #29705 from y-yagi/do_not_update_secrets_yml_enc

Do not update `secrets.yml.enc` when secretes do not change

railties/lib/rails/secrets.rb

@@ -107,7 +107,7 @@ def writing(contents)
 
           updated_contents = IO.binread(tmp_path)
 
-          write(File.read(tmp_path))
+          write(updated_contents) if updated_contents != contents
         ensure
           FileUtils.rm(tmp_path) if File.exist?(tmp_path)
         end