chore(l10n): update Serbian translations

Currently translated at 96.5% (250 of 259 strings)

Translation: Fossify/Calendar
Translate-URL: https://hosted.weblate.org/projects/fossify/calendar/sr/
Via: Weblate

Author: weblate

app/src/main/res/values-sr/strings.xml

@@ -263,4 +263,4 @@
     <string name="accessibility_previous_day">Иди на претходни дан</string>
     <string name="accessibility_next_day">Иди на следећи дан</string>
     <string name="caldav">ЦалДАВ</string>
-</resources>
+</resources>