Autofix Rubocop Style/StringLiterals (#23695)

db/migrate/20210306164523_account_ids_to_timestamp_ids.rb

@@ -10,7 +10,7 @@ class AccountIdsToTimestampIds < ActiveRecord::Migration[5.1]
   end
 
   def down
-    execute("LOCK accounts")
+    execute('LOCK accounts')
     execute("SELECT setval('accounts_id_seq', (SELECT MAX(id) FROM accounts))")
     execute("ALTER TABLE accounts ALTER COLUMN id SET DEFAULT nextval('accounts_id_seq')")
   end