Missing `selected` class on multi-select Year Picker

[michaelsawyers]

Describe the bug
When using selectsMultiple along with showYearPicker, when I select various years they are not getting the selected class and therefore not able to style as selected.

To Reproduce

const MultiYearPicker = () => {
  const [selectedDates, setSelectedDates] = useState([]);

  return (
    <DatePicker
      placeholder="Select years"
      dateFormat="yyyy"
      showYearPicker
      selectsMultiple
      selectedDates={selectedDates}
      onChange={setSelectedDates}
      shouldCloseOnSelect={false}
      disabledKeyboardNavigation
    />
  );
};

1. When I select years, say 2019 and 2024
2. These years are added to state and I see the dates in the input
3. But those year divs do not get the react-datepicker__year-text--selected classes so they remain unstyled.
   (This may be issue with other show_Picker variations, but showYearPicker is what I've tested.

Expected behavior
I expect the selected class being applied.

Screenshots

Screen.Recording.2025-01-15.at.10.16.00.AM.mov

Desktop (please complete the following information):

• OS: macOS
• Browser: chrome
• Version 131

[balajis-qb]

I'll work on this issue