Fix dingtalk_tracker_data rubocop

fix following rubocop issue

jh/app/models/integrations/dingtalk_tracker_data.rb:5:66: C: [Correctable] Rails/RedundantForeignKey: Specifying the default value for foreign_key is redundant.
    belongs_to :integration, inverse_of: :dingtalk_tracker_data, foreign_key: :integration_id
                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^