fix(deps)(deps): update onnxruntime-gpu requirement in /ml-service

Updates the requirements on [onnxruntime-gpu](https://github.com/microsoft/onnxruntime) to permit the latest version.
- [Release notes](https://github.com/microsoft/onnxruntime/releases)
- [Changelog](https://github.com/microsoft/onnxruntime/blob/main/docs/ReleaseNotesWorkflow.md)
- [Commits](microsoft/onnxruntime@v1.28.0...v1.29.0)

---
updated-dependencies:
- dependency-name: onnxruntime-gpu
  dependency-version: 1.29.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

ml-service/onnx-serving/requirements.txt

@@ -1,7 +1,7 @@
 fastapi>=0.140.13
 uvicorn[standard]>=0.24.0
 onnxruntime>=1.28.0
-onnxruntime-gpu>=1.28.0; platform_system == "Linux"
+onnxruntime-gpu>=1.29.0; platform_system == "Linux"
 numpy>=2.5.1
 pydantic>=2.5.0
 torch>=2.13.0