Bump transformers from 4.36.0 to 4.48.0 in /api

Bumps [transformers](https://github.com/huggingface/transformers) from 4.36.0 to 4.48.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](https://github.com/huggingface/transformers/compare/v4.36.0...v4.48.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

api/requirements.txt

@@ -5,5 +5,5 @@ torch==2.1.0
 torchaudio==2.1.0
 torchvision==0.16.0
 tqdm==4.66.1
-transformers==4.36.0
+transformers==4.48.0
 urllib3==1.26.19