Bump tract-onnx from 0.21.6 to 0.21.7 in /cattus-engine

Bumps [tract-onnx](https://github.com/snipsco/tract) from 0.21.6 to 0.21.7.
- [Release notes](https://github.com/snipsco/tract/releases)
- [Changelog](https://github.com/sonos/tract/blob/main/CHANGELOG.md)
- [Commits](sonos/tract@0.21.6...0.21.7)

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

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

cattus-engine/Cargo.toml

@@ -23,7 +23,7 @@ pleco = "0.5.*"
 
 # Optional dependencies for model inference
 pyo3 = { version = "0.22.0", features = ["auto-initialize"], optional = true }
-tract-onnx = { version = "0.21.5", optional = true }
+tract-onnx = { version = "0.21.7", optional = true }
 ort_lib = { package = "ort", version = "2.0.0-rc.4", optional = true }
 
 [features]