Bump transformers from 3.5.1 to 4.38.0 in /examples/research_projects…

…/bertology (huggingface#31256)

Bump transformers in /examples/research_projects/bertology

Bumps [transformers](https://github.com/huggingface/transformers) from 3.5.1 to 4.38.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v3.5.1...v4.38.0)

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

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

examples/research_projects/bertology/requirements.txt

@@ -1 +1 @@
-transformers == 3.5.1
+transformers == 4.38.0