Bump transformers from 4.37.2 to 4.38.1 (#320)

* Bump transformers from 4.37.2 to 4.38.1

Bumps [transformers](https://github.com/huggingface/transformers) from 4.37.2 to 4.38.1.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.37.2...v4.38.1)

---
updated-dependencies:
- dependency-name: transformers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update requirements.txt

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Romain Beaumont <romain.rom1@gmail.com>

requirements.txt

@@ -21,7 +21,7 @@ torchaudio==2.2.0
 soundfile
 omegaconf
 einops
-transformers==4.37.2
+transformers
 Pillow
 accelerate
 bitsandbytes