[enhancement]: Update documentation on Infill & Scaling

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Contact Details

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### What should this feature add?

I'm on v4.2.4. I was reading the [Infill & Scaling](https://invoke-ai.github.io/InvokeAI/features/UNIFIED_CANVAS/#infill-scaling) documentation and some things that may need an update:

1. Inpaint Replace: I couldn't find Inpaint Replace anywhere in the Unified Canvas UI
2. Infill Method: There's actually 4 infill methods now and Patchmatch isn't one of them (tile, lama, cv2, color)
3. Scale Before Processing & W/H: I think it might be helpful to call out that this setting is under the Image -> Advanced Options panel

### Alternatives

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### Additional Content

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