insert a relationship field, or a page-link field inside your repeater.
and get the value of that field and wrap your image with that link.
easier is if you use page-link. because value will return the post’s url (permalink).
with relationship you have more options, because you are able to get any value from linked post (permalink, acf-fields, …) but it is not necessary to use it when you anyway only need the permalink.
