What?

Add an optional input repository_ids, which is a list of repository IDs that the token should have access to.

https://docs.github.com/en/rest/apps/apps?apiVersion=2022-11-28#create-an-installation-access-token-for-an-app

          repository_ids: >-
            [${{github.repository_id}}]

Why?

To limit repositories.
The advantage of repository_ids compared with repositories is that we can get repository_id from github context's github.repository easily.
On the other hand, it is a little difficult to get a repository name from github context.