Git is detected as missing on Windows when installed with Scoop

### Custom Node Testing

- [x] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

ComfyUI should detect and use the version of Git already available on my system

### Actual Behavior

ComfyUI gives error status and shows Git as missing


### Steps to Reproduce

Install Git using the Scoop package manager, then launch ComfyUI

### Debug Logs

```powershell
When you run a troubleshooting command, any output will be shown here.
```

### Other

It let me bypass the check on first install, but subsequent app launches will only show me the error screen.

Terminal outputs for verifying it's in my path:
```
where.exe git
D:\scoop\shims\git.exe
```
```
git --version
git version 2.48.1.windows.1
```