Bump transformers from 4.50.0 to 4.51.0 in /examples/bitnet-1.58b (#615)

Bumps [transformers](https://github.com/huggingface/transformers) from 4.50.0 to 4.51.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.50.0...v4.51.0)

---
updated-dependencies:
- dependency-name: transformers
  dependency-version: 4.51.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/bitnet-1.58b/requirements.txt

@@ -1,3 +1,3 @@
 lm_eval==0.3.0
 flash_attn
-transformers==4.50.0
+transformers==4.51.0