[Update]: Testing a release before deploying it - document

[emaralive]

Link to the existing GH Documentation page.

https://github.com/buddypress/buddypress/blob/master/docs/contributor/project/release/test-checklist.md

What needs to be updated?

Add information regarding the testing of BP CLI, e.g., wp bp activity list, could be used for verification and validation.

Additionally, perform some wordsmithing

Handbook of the page to update

buddypress/docs/contributor

Tasks to accomplish

• This task has been added to the "Todo" panel of the Documentation project.
• A PR has been submitted to the BuddyPress GH repository, it has been linked to this issue/task & the task was moved to the "In progress" panel of the Documentation project.
• The PR has been converted to a SVN patch and committed to the BuddyPress SVN repository & the task was moved to the "Done" panel of the Documentation project.