Bump peft from 0.17.1 to 0.18.0 in /tests/python_tests

Bumps [peft](https://github.com/huggingface/peft) from 0.17.1 to 0.18.0.
- [Release notes](https://github.com/huggingface/peft/releases)
- [Commits](huggingface/peft@v0.17.1...v0.18.0)

---
updated-dependencies:
- dependency-name: peft
  dependency-version: 0.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

tests/python_tests/requirements.txt

@@ -29,4 +29,4 @@ datasets==3.6.0; sys_platform != "linux"
 torchcodec==0.7.0; sys_platform == "linux"
 rouge==1.0.1
 # - microsoft/Phi-4-multimodal-instruct
-peft==0.17.1
+peft==0.18.0