Bump transformers from 4.26.0 to 4.38.0 in /examples/research_projects/vqgan-clip (#31242)

Bump transformers in /examples/research_projects/vqgan-clip

Bumps [transformers](https://github.com/huggingface/transformers) from 4.26.0 to 4.38.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](https://github.com/huggingface/transformers/compare/v4.26.0...v4.38.0)

---
updated-dependencies:
- dependency-name: transformers
  dependency-type: direct:production
...

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

examples/research_projects/vqgan-clip/requirements.txt

@@ -21,7 +21,7 @@ taming-transformers
 torch
 torchvision
 tqdm
-transformers==4.26.0
+transformers==4.38.0
 tokenizers==0.13.2
 typing_extensions
 wandb