update changelog with second issue number for testcase

Author: sdetweil

CHANGELOG.md

@@ -26,7 +26,7 @@ planned for 2025-04-01
 ### Fixed
 
 - [calendar] fix clipping events being broadcast (#3678)
-- [calendar] fix arrayed symbols, #3267, again, add testcase
+- [calendar] fix arrayed symbols, #3267, again, add testcase, add testcase for #3678
 
 ## [2.30.0] - 2025-01-01