* Docs: fix missing dependency in YOLOv9 build script
I had this command fail because it didn't have cmake available.
This change fixes that problem.
* Docs: avoid failure in YOLOv9 build script
Pinning to 0.4.36 avoids this error:
```
10.58 Downloading onnx
12.87 Building onnxsim==0.5.0
1029.4 × Failed to download and build `onnxsim==0.5.0`
1029.4 ╰─▶ Package metadata version `0.4.36` does not match given version `0.5.0`
1029.4 help: `onnxsim` (v0.5.0) was included because `onnx-simplifier` (v0.5.0)
1029.4 depends on `onnxsim`
```
* Update Dockerfile instructions for object detectors
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Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>