Fix convert count logic.

[slizhva]

public function convertCount(string|int|float $number): string
{
    if (OverlookPlugin::get()->shouldAbbreviateCount()) { // <== false <== OverlookPlugin::make()->abbreviateCount(false)
        return Number::abbreviate((int) $number);
    }

    return $number; // expected to be string per function definition, but string|int|float returned.
}