Authorize GitHub App permission error

### Before opening, please confirm:

- [ ] I have checked to see if my question is addressed in the [FAQ](https://github.com/aws-amplify/amplify-hosting/blob/master/FAQ.md).
- [ ] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-hosting/issues?q=is%3Aissue+).
- [ ] I have read the guide for [submitting bug reports](https://github.com/aws-amplify/amplify-hosting/blob/master/CONTRIBUTING.md).
- [ ] I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.

### App Id

d1sj4cr45c2t8p

### Region

us-east-1

### Amplify Hosting feature

_No response_

### Describe the bug

Got an error when i try to Migrate to Amplify GitHub App.
Error message : "We do not have permission to access this repository. Please update your permissions and try again."

Github permissions looks correctly set for the repo.

I tried to delete the deploy keys and webhooks but it's not working. And now i can't deploy anymore with the previous OAuth access. So I'm stuck.

### Expected behavior

When i click on reconnect the repo, i can migrate to Amplify Github App. The permissions are enough to create deploy keys and webhooks and i can re-connect my repo and deploy my app.

### Reproduction steps

1. Click on the "Start migration" button.
2. Error shown

3. Click on the "update repository permissions"

4. All permissions are set for the repo. Can't go further.

### Build Settings

_No response_

### Additional information

_No response_

No source files or tests are named in the report. Start by reproducing the migration in the stated us-east-1 region with the provided reproduction steps, then inspect the GitHub App permission and repository reconnection flow. Done means a repository with the stated permissions can migrate, reconnect, and deploy without the reported access error.

Written by the indexing model from the issue text.