Bump transformers from 4.20.1 to 4.38.0 in /forge/test/santacoder (#225)

Bumps [transformers](https://github.com/huggingface/transformers) from 4.20.1 to 4.38.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.20.1...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>

forge/test/santacoder/requirements.txt

@@ -1,2 +1,2 @@
-transformers == 4.20.1
+transformers == 4.38.0
 torch == 1.11.0+cpu