Extraction pipeline bug fix (#2015)

# Description

Small bug in the YAML spec for extraction pipelines. [API
Spec](https://api-docs.cognite.com/20230101/tag/Extraction-Pipelines/operation/createExtPipes#!path=items/notificationConfig/allowedNotSeenRangeInMinutes&t=request)

## Changelog

- [x] Patch
- [ ] Skip

## cdf

### Fixed

- When running `cdf build` Toolkit no longer give warnings on extraction
pipelines for unused field allowedNotSeenRangeInMinutes. For example:
`In notificationConfig unused field:
'allowedNotSeenRangeInMinutes'`

## templates

No changes.
