schedule timezone marked as unknown

[jonnytest1]

Describe the bug
Create a yaml with

on:
schedule:
- cron:'* * * * *'
timezone: 'Sometime/Zone'

Timezone is marked as unknown

To Reproduce
Steps to reproduce the behavior:

1. With this workflow '...'
2. Do this '...'
3. See error

its documented but also shows unexpected value

Expected behavior
https://docs.github.com/en/actions/reference/workflows-and-actions/events-that-trigger-workflows#schedule

Interestingly enough the german version of those docs dont show the timezone support 🤔

https://docs.github.com/de/actions/reference/workflows-and-actions/events-that-trigger-workflows#schedule

A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Extension Version
v0.29.1

[angel-jiakou]

@jonnytest1 If you change the format, I think the extension will recognize it. timezone parameter is a property of schedule so it should align with cron.

- cron:'* * * * *'
  timezone: 'Sometime/Zone'