Bump diffusers

Bumps [diffusers](https://github.com/huggingface/diffusers) from 0.19.3 to 0.38.0.
- [Release notes](https://github.com/huggingface/diffusers/releases)
- [Commits](huggingface/diffusers@v0.19.3...v0.38.0)

---
updated-dependencies:
- dependency-name: diffusers
  dependency-version: 0.38.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

doc/source/templates/05_dreambooth_finetuning/dreambooth/requirements.txt

@@ -1,6 +1,6 @@
 accelerate==0.20.3
 bitsandbytes==0.39.1
-diffusers==0.19.3
+diffusers==0.38.0
 flax==0.6.11
 ipywidgets
 huggingface_hub==0.19.4