Shader Graph "Zoom Step Size" can be set to 0 even though the zoom still works

How to reproduce:
1. Create a new Unity project
2. In the Project window, right-click -> Create -> Shader Graph -> URP -> Unlit Shader Graph
3. Go to Edit -> Preferences -> Shader Graph -> Zoom Step Size
4. Set the Zoom Step Size to 0 
5. Go back to the Shader Graph and try to zoom in/out

Expected results: The zoom doesn't work
Actual results: The zoom works

Reproducible with: 6000.0.67f1, 6000.3.7f1, 6000.4.0b7, 6000.5.0a6

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: The minimum zoom step should be some small number instead of 0