Add South Korea's temporary public holidays

Add South Korea's temporary public holidays to January 27th, 2025.

holidays/countries/south_korea.py

@@ -108,7 +108,8 @@ def _populate_observed(self, dts: set[date], three_day_holidays: dict[date, str]
             if not self._is_observed(dt):
                 continue
             dt_observed = self._get_observed_date(
-                dt, SUN_TO_NEXT_WORKDAY if dt in three_day_holidays else SAT_SUN_TO_NEXT_WORKDAY
+                dt,
+                (SUN_TO_NEXT_WORKDAY if dt in three_day_holidays else SAT_SUN_TO_NEXT_WORKDAY),
             )
             if dt_observed != dt or len(self.get_list(dt)) > 1:
                 if dt_observed == dt:
@@ -333,7 +334,7 @@ class SouthKoreaLunisolarHolidays(_CustomChineseHolidays):
 class SouthKoreaStaticHolidays:
     """
     References:
-        - https://namu.wiki/w/임시공휴일 *
+        - https://namu.wiki/w/임ㅜ시공휴일 *
         - https://namu.wiki/w/공휴일/대한민국 **
         - https://namu.wiki/w/대체%20휴일%20제도
 
@@ -617,6 +618,8 @@ class SouthKoreaStaticHolidays:
         2023: (OCT, 2, temporary_public_holiday),
         # 76th Anniversary of the Armed Forces of Korea.
         2024: (OCT, 1, armed_forces_day),
+        # Added to create a 6-day long holiday period.
+        2025: (JAN, 27, temporary_public_holiday),
     }
     # Pre-2014 Alternate Holidays
     # https://namu.wiki/w/대체%20휴일%20제도#s-4.2.1