[docs] Fix the description of tickInterval

[alexfauquette]

From docs feedback

It is not clear when tickInterval is used and when is not. I placed breakpoint in useTicks.js to see how ticks are calculated for my BarChart, and useTicks returned result without using tickInterval value at all, doesn't matter if it is array or filtering function (code bellow comment //scale type = 'band').

BtW this feature is not applied on bar chart. The reason why is very opinionated. bar chart should be used on categorical plotting. So each tick should be present. But it's something open to dicussion

[mui-bot]

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[JCQuintas]

something open to dicussion

While it is current behaviour right now, it will eventually need changes, as #12537 would introduce "non-band" series types to bars. The current concept might be too limited

[alexfauquette]

it will eventually need changes, as #12537 would introduce "non-band" series types

I still have no clear idea about how we can fix this issue. If you have ideas about how the DX should look like to support it, I would be interested to read it :)