Misspelled i18n offsetPositionsFirst message also missing translation

[yanmariomenev]

Describe the bug
There is a typo in the recurrence editor localized messages for offsetPositionFirst:

This also leads to missing translation messages as there are only these four added:

https://github.com/telerik/kendo-angular-messages/blob/develop/messages/scheduler/scheduler.bg-BG.yml#L51

Workaround
Use the SchedulerCustomMessagesComponent recurrenceEditorOffsetPositionsFirst for translation.
https://stackblitz.com/edit/angular-qtg8tb?file=src%2Fapp%2Fapp.module.ts,src%2Fapp%2Fapp.component.ts

[dtopalov]

Fixed in version 13.2.1