Issues using fine-grained tokens

[tpluscode]

I have been trying to use fine-grained PAT to submit a new spec to withfig/autocomplete using the action.

I wanted to use a fork at our org zazuko/autocomplete but when that did not work initially, I created a personal fork at tpluscode/autocomplete

So far, only a classic token worked, which created a PR from the tpluscode form

Trying fine-grained tokens, I would get various errors despite having set it up with the mentioned permissions

HttpError: Resource not accessible by personal access token - https://docs.github.com/rest/branches/branches#sync-a-fork-branch-with-the-upstream-repository

HttpError: Resource not accessible by integration - https://docs.github.com/rest/users/users#get-the-authenticated-user

HttpError: Resource not accessible by personal access token - https://docs.github.com/rest/pulls/pulls#create-a-pull-request

Overall, I think the action is missing a setting to say which is the fork to use. Right now there is way to decide between zazuko/autocomplete and tpluscode/autocomplete, is there?