Updated action value

Updated the value of ‘action’
Added description of variable

Added explanation of what was happening to assign the variable value.
Made comment more accurate

Updated comment to more accurately reflect what’s happening.
Changed hook name

Changed hook name from ‘wp_ajax_cc-author-change-postauthor’ to
‘wp_ajax_cc_author_change_postauthor’
Fixed function assignment

Removed variable from function assignment
Changed conditional

Updated conditional to improve variable validation.
Moved 'relnofollow'

Moved ‘relnofollow’ check outside of author data conditional.