Bump transformers from 4.36.0 to 4.38.0 in /examples/large_models/Huggingface_accelerate/llama2 (#3081)

* Bump transformers

Bumps [transformers](https://github.com/huggingface/transformers) from 4.36.0 to 4.38.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.36.0...v4.38.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

* Update requirements.txt

---------

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

Author: dependabot[bot]

examples/large_models/Huggingface_accelerate/llama2/requirements.txt

@@ -1,4 +1,4 @@
-transformers==4.36.0
+transformers>=4.38.0
 accelerate
 bitsandbytes
 scipy