Bump diffusers from 0.29.2 to 0.31.0

Bumps [diffusers](https://github.com/huggingface/diffusers) from 0.29.2 to 0.31.0.
- [Release notes](https://github.com/huggingface/diffusers/releases)
- [Commits](huggingface/diffusers@v0.29.2...v0.31.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,4 +1,4 @@
-diffusers==0.29.2
+diffusers==0.31.0
 nltk==3.9.1
 PySide6==6.7.2
 requests==2.32.3