Fix Rails/SquishedSQLHeredocs cop (#24694)

lib/mastodon/snowflake.rb

@@ -146,7 +146,7 @@ module Mastodon::Snowflake
     private
 
     def already_defined?
-      connection.execute(<<~SQL).values.first.first
+      connection.execute(<<~SQL.squish).values.first.first
         SELECT EXISTS(
           SELECT * FROM pg_proc WHERE proname = 'timestamp_id'
         );

lib/tasks/tests.rake

@@ -113,7 +113,7 @@ namespace :tests do
 
     desc 'Populate the database with test data for 2.4.0'
     task populate_v2_4: :environment do # rubocop:disable Naming/VariableNumber
-      ActiveRecord::Base.connection.execute(<<~SQL)
+      ActiveRecord::Base.connection.execute(<<~SQL.squish)
         INSERT INTO "settings"
           (id, thing_type, thing_id, var, value, created_at, updated_at)
         VALUES