Fix a deprecation in referential_integrity_test.rb file

Author: fatkodima

activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb

@@ -126,7 +126,7 @@ def test_all_foreign_keys_valid_having_foreign_keys_in_multiple_schemas
     SQL
 
     assert_equal 1, result.first["count"], "referential_integrity_test_schema should have 1 foreign key"
-    assert @connection.all_foreign_keys_valid?
+    @connection.check_all_foreign_keys_valid!
   ensure
     @connection.drop_schema "referential_integrity_test_schema", if_exists: true
   end