build(deps): Bump transformers in /examples/flowertune-llm-code

Bumps [transformers](https://github.com/huggingface/transformers) from 4.53.0 to 5.0.0rc3.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.53.0...v5.0.0rc3)

---
updated-dependencies:
- dependency-name: transformers
  dependency-version: 5.0.0rc3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/flowertune-llm-code/pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
     "bitsandbytes==0.49.1",
     "scipy==1.13.0",
     "peft==0.6.2",
-    "transformers==4.53.0",
+    "transformers==5.0.0rc3",
     "sentencepiece==0.2.1",
     "omegaconf==2.3.0",
     "hf_transfer==0.1.8",