chore(deps): bump onnx from 1.15.0 to 1.16.0

Bumps [onnx](https://github.com/onnx/onnx) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/onnx/onnx/releases)
- [Changelog](https://github.com/onnx/onnx/blob/main/docs/Changelog-ml.md)
- [Commits](onnx/onnx@v1.15.0...v1.16.0)

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

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

requirements.txt

@@ -27,7 +27,7 @@ MarkupSafe==2.1.3
 mpmath==1.3.0
 networkx==3.1
 numpy==1.26.1
-onnx==1.15.0
+onnx==1.16.0
 openai==1.16.2
 openai-multi-tool-use-parallel-patch==0.2.0
 optimum==1.16.2