build(deps): update onnx requirement from <1.18.0,>=1.12.0 to >=1.12.0,<1.19.0 in /requirements (#20841)

build(deps): update onnx requirement in /requirements

Updates the requirements on [onnx](https://github.com/onnx/onnx) to permit the latest version.
- [Release notes](https://github.com/onnx/onnx/releases)
- [Changelog](https://github.com/onnx/onnx/blob/main/docs/Changelog-ml.md)
- [Commits](onnx/onnx@v1.12.0...v1.18.0)

---
updated-dependencies:
- dependency-name: onnx
  dependency-version: 1.18.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/pytorch/test.txt

@@ -9,7 +9,7 @@ pytest-random-order ==1.1.1
 cloudpickle >=1.3, <3.2.0
 scikit-learn >0.22.1, <1.7.0
 numpy >=1.17.2, <1.27.0
-onnx >=1.12.0, <1.18.0
+onnx >=1.12.0, <1.19.0
 onnxruntime >=1.12.0, <1.21.0
 psutil <7.0.1 # for `DeviceStatsMonitor`
 pandas >1.0, <2.3.0  # needed in benchmarks