Bump transformers in /examples/research_projects/realfill

Bumps [transformers](https://github.com/huggingface/transformers) from 4.38.0 to 4.48.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.38.0...v4.48.0)

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

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

Author: dependabot[bot]

examples/research_projects/realfill/requirements.txt

@@ -1,6 +1,6 @@
 diffusers==0.20.1
 accelerate==0.23.0
-transformers==4.38.0
+transformers==4.48.0
 peft==0.5.0
 torch==2.2.0
 torchvision>=0.16