Update model-notifications.md - description is not allowed as a group property

[erdinculuturk-nw]

This pull request includes a small change to the website/docs/docs/deploy/model-notifications.md file. The change moves the description field from the groups level to the owner level for both the finance and marketing groups.

With the current configuration, parsing failed and returned the following error:

08:32:37  Running dbt...
dbt command failed
08:32:58  Encountered an error:
Parsing Error
  Invalid groups config given in .........
Additional properties are not allowed ('description' was unexpected)

Changes to model-notifications.md:

• Moved the description field for the finance group to the owner level.
• Moved the description field for the marketing group to the owner level.

[welcome]

Hello!👋 Thanks for contributing to the dbt product documentation and opening this pull request! ✨
We use Markdown and some HTML to write the dbt product documentation. When writing content, you can use our style guide and content types to understand our writing standards and how we organize information in the dbt product docs.
We'll review your contribution and respond as soon as we can. 😄

[vercel]

@erdinculuturk-nw is attempting to deploy a commit to the dbt-labs Team on Vercel.

A member of the Team first needs to authorize it.

[mirnawong1]

hey @erdinculuturk-nw , thanks for opening this pr up and i've got the same behavior! really appreciate your contribution in getting this corrected!