@Ricky118 The short answer is that you can't, unless you want them to see everything else on your Airbnb account.
There's a great app called TurnoverBnB that makes it very easy to use. They charge a monthly fee.
Importing the Airbnb calendar to your Google calendar has too many problems to make it workable: 1) If you import it and make it private, it won't update dynamically; 2) in order to make it update dynamically, it has to be public; 3) on both Apple Calendar and Google Calendar, it's a subscription that you can't cancel, so if the cleaner leaves he/she will always have access to it.
I just keep a Word document that I update with new bookings and send it to my cleaner. She's old-fashioned and prefers it that way.