GitLab

Summary:
- Add citations of [`TorchAudio-Squim`](https://arxiv.org/abs/2304.01448) publication.
- Update descriptions in the `SQUIM_OBJECTIVE` and `SQUIM_SUBJECTIVE` pipelines.

Pull Request resolved: https://github.com/pytorch/audio/pull/3254

Reviewed By: hwangjeff

Differential Revision: D44802015

Pulled By: nateanl

fbshipit-source-id: ca08298ec1eafefdd671ff2e010ef18f7372f9f8