'Apologise' is not spelled incorrectly. 'Apologise' is a perfectly correct alternative to 'apologize' which you will encounter everywhere apart from the US.
However, your post contains a glaring error. Your title should read:
Don't judge a book by its cover.
You might want to google the difference between its and it's, and correct your post. It does not give learners of English a good impression when they see native speakers making mistakes in their own language.
The first word should also be "Who's" or the full form "Who has?".
"Whose" is a different word entirely.
That’s an error on my part... it should be its... it’s means it is... No need to google it. Thanks.