Personally I would not require a change request form for the communications plan. I would use document version control to issue a new version with a note saying why it was updated. The kind of change you mention - a new stakeholder - doesn't impact cost/delivery/scope/timelines etc so it wouldn't warrant using the change management process. Your configuration management plan will set out what documents require change control forms and CCB approval.

if any reason led to update communication management plan such as one new stakeholder join , one stakeholder leave the project ,communication requirement of one stakeholder had been changed , so to update communication management plan as it is part of project management plan , change request will be submitted but in such a case is it required to forward it to CCB or project manager can take action and give approval directly for such change requests