Unable to validate/pack the orb with orb-tools/pack

## Orb version:

12.1.0

## What happened:

Since 28/06/2024 around 10:00 AM (UTC), we can't validate and pack the orb with the job `orb-tools/pack`.

We obtain the following error on the `Validating orb` step :

```
Error: Unable to validate config: failure calling GraphQL API: 401 Unauthorized

Exited with code exit status 255
```

https://app.circleci.com/pipelines/github/iadvize/system-ci-cd/422/workflows/ee35824c-5240-45b1-830e-83430a574042/jobs/2846
## Expected behavior:

We should obtain the following message and no error: `Orb at `orb.yml` is valid.`.

## Additional Information:

It happened suddenly without any update of the version of the orb, without any change to our code.

I think it might be linked to the default value passed for `$CIRLCE_TOKEN` : `dummy` which doesn't seem accepted anymore.