docs: improve documentation of 'presetConfig' option

[BinToss]

• What type of object(s) does this option expect? Strings? Arrays? Please provide examples.

Note: For presets that expects a configuration object, such as conventionalcommits, the presetConfig option must be set.

• Do any other presets require this option?
• Do any presets not require it, but allow it to be used to configure the preset?

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conventional-changelog-conventionalcommits no longer requires the presetConfig to be set. The corresponding parameter is optional these days.

[GorreriFranco]

Hi! Are there any updates on this?

[gabriel-henriq]

Hi! Are there any updates on this?

[kddsultan]

Even an example would be pretty helpful (instead of looking into the code)