Bump transformers from 4.36.0 to 4.38.0 in /executors/ClipEncoder

Bumps [transformers](https://github.com/huggingface/transformers) from 4.36.0 to 4.38.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.36.0...v4.38.0)

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

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

executors/ClipEncoder/requirements.txt

@@ -3,4 +3,4 @@ jina>=3.2.0
 docarray>=0.21.0,<0.22.0
 Pillow==10.2.0
 torch==1.13.1
-transformers==4.36.0
+transformers==4.38.0