Upgrade Angular dependencies to version to 21.2.12#2

Ashwini-SF5049 wants to merge 1 commit intoSyncfusionExamples:masterSyncfusionExamples/ej2-angular-datetimepicker:masterfrom

Ashwini-SF5049:EJ2-12345-angular-datetimepickerAshwini-SF5049/ej2-angular-datetimepicker:EJ2-12345-angular-datetimepickerCopy head branch name to clipboard