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
...
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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