Missing EE 2025 Calendar in _assets/calendars

[KHiis]

Estonian bank holidays are missing - the following should be added.

---

filename: holidays_calendar.ee.2025.yml

# https://publicholidays.ee/2025-dates/
---
- title: "New Year's Day"
  date: 01/01/2025
- title: "Estonian Independence Day"
  date: 24/02/2025
- title: "Good Friday"
  date: 18/04/2025
- title: "Easter Sunday"
  date: 20/04/2025
- title: "May Day"
  date: 01/05/2025
- title: "Whit Sunday"
  date: 08/06/2025
- title: "Victory Day"
  date: 23/06/2025
- title: "Midsummer Day"
  date: 24/06/2025
- title: "Independence Restoration Day"
  date: 20/08/2025
- title: "Christmas Eve"
  date: 24/12/2025
- title: "Christmas Day"
  date: 25/12/2025
- title: "Boxing Day"
  date: 26/12/2025

[ben-f3]

Thanks for highlighting @KHiis. This has been added, and merged as part of #64