fix: Read Only still allow to change value with keyboard up and down arrow in FluentNumberField component

[DrMozze]

On the documentation website : https://www.fluentui-blazor.net/NumberField

Section "Filled Appearance", you can click the two last field "Read only" and then change the value inside them with arrow Up and Down of your keyboard.

I assume that in read-only mode, it must be impossible to change the value of the component.

[dvoituron]

Indeed, it's not normal to be able to modify values.

[dvoituron]

This problem is due to a bug in the associated WebComponent.
It has been worked around by forcing the min/max values when the ReadOnly property is applied.

This problem will be corrected in the next version: #1041