Wrong name in description compared to google sheet api BD_DIVIDEND_CALENDER & BD_REPORT_CALENDER

[Jayys]

Minor problem but there is no function called BD_DIVIDEND_CALENDAR in Google sheet, only in the documentation in github. its called BD_DIVIDEND_CALENDER when using it in Google Sheet.

Same problem with BD_REPORT_CALENDAR, should also be an 'E' in the end.