Even though you may choose to still send CSE to Accra as advised above,it's absolutely not necessary as it doesn't fall into fall among the information/details after your submission that needs to be expressly updated on your file neither was it a unintentionally/deliberately withheld information/detail by you.
Aside unintentional/deliberate withholding of details before your submission(like VISA rejection issues),the updates that you need to EXPRESSLY inform your local visa office can be seen at the tail-end of your Positive eligibility review (PER) mail and its quoted below.....
"If additional documents are required, you will be provided an address to forward required documents. Please inform the visa office of any changes in your application (e.g. birth or adoption of a child, marriage or common-law relationship, new occupation or employer, submission of an Arranged Employment Opinion approved by Human Resources and Skills Development Canada, change of address, change of e-mail address, change of immigration representative, etc). Please include a letter identifying what the changes are and any relevant supporting documents. If your documents are not in English or French, send a notarized (certified) translation with a copy of the originals"
But as advised,you can update them via the CSE but if you choose not to,it won't affect you negatively.
Personally for me and many of my buddies who fall into same scenario as you,it wasn't an issue so you are covered.
Cheers.