fix(si): update Christmas holiday year from 2020 to 2021

Author: KristjanESPERANTO

src/si/holidays/holidays.public.csv

@@ -25,7 +25,7 @@ fa6d76f7-32dc-4c81-b7ed-00653c8e2c91;SI;2021-06-25;;Public;National;SL dan drža
 142ccaed-dc3b-4777-94d6-b6f371f29ae1;SI;2021-08-15;;Public;National;SL Marijino vnebovzetje,DE Mariä Himmelfahrt,EN Assumption Day
 4f508f22-86fe-422c-adf7-73c5acdc6365;SI;2021-10-31;;Public;National;SL dan reformacije,DE Reformationstag,EN Reformation Day
 8ed46905-fc09-4373-b725-b187832bdaab;SI;2021-11-01;;Public;National;SL dan spomina na mrtve,DE Tag der Toten,EN Day of Remembrance for the Dead
-6f9c8d2c-8951-493d-9c36-bc58d504b86a;SI;2020-12-25;;Public;National;SL božič,DE Weihnachten,EN Christmas Day
+6f9c8d2c-8951-493d-9c36-bc58d504b86a;SI;2021-12-25;;Public;National;SL božič,DE Weihnachten,EN Christmas Day
 b094d424-9c7c-4d3e-9104-2f8c8dec0284;SI;2021-12-26;;Public;National;SL dan samostojnosti in enotnosti,DE Tag der Unabhängigkeit und Einheit,EN Independence and Unity Day
 2a02e7cb-18ab-4836-b206-52be1f2c6933;SI;2022-01-01;2022-01-02;Public;National;SL novo leto,DE Neujahrsferien,EN New Year Holiday
 ba091cba-799a-4dfc-bf79-aca13c29fdb8;SI;2022-02-08;;Public;National;SL Prešernov dan,DE Prešeren-Tag,EN Prešeren Day