Bump transformers from 4.6.0 to 4.30.0

Bumps [transformers](https://github.com/huggingface/transformers) from 4.6.0 to 4.30.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](https://github.com/huggingface/transformers/compare/v4.6.0...v4.30.0)

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

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

requirements.txt

@@ -33,7 +33,7 @@ threadpoolctl==2.1.0
 tokenizers==0.9.2
 torch==1.6.0
 tqdm==4.48.2
-transformers==4.6.0
+transformers==4.30.0
 typing-extensions==3.7.4.3
 urllib3==1.26.2
 zipp==3.4.0