Bump timm from 1.0.11 to 1.0.15 in /samples

Bumps [timm](https://github.com/huggingface/pytorch-image-models) from 1.0.11 to 1.0.15.
- [Release notes](https://github.com/huggingface/pytorch-image-models/releases)
- [Commits](huggingface/pytorch-image-models@v1.0.11...v1.0.15)

---
updated-dependencies:
- dependency-name: timm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

samples/export-requirements.txt

@@ -6,6 +6,6 @@ numpy<2.0.0; sys_platform == 'darwin'
 einops==0.8.0  # For Qwen
 transformers_stream_generator==0.0.5  # For Qwen
 diffusers==0.31.0 # For image generation pipelines
-timm==1.0.11  # For exporting InternVL2
+timm==1.0.15  # For exporting InternVL2
 torchvision  # For visual language models
 transformers>=4.43 # For Whisper