Bump transformers in /image_generation/stable_diffusion_1_5/cpp/scripts

Bumps [transformers](https://github.com/huggingface/transformers) from 4.37.0 to 4.40.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.37.0...v4.40.0)

---
updated-dependencies:
- dependency-name: transformers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

image_generation/stable_diffusion_1_5/cpp/scripts/requirements.txt

@@ -1,6 +1,6 @@
 --extra-index-url https://download.pytorch.org/whl/cpu
 torch==2.1.2+cpu
 diffusers==0.25.1
-transformers==4.37.0
+transformers==4.40.0
 optimum-intel[nncf,openvino]==1.12.4
 huggingface_hub[cli]==0.20.3