Update card_vertical_button.md

[neiromaster]

typo: booelan -> boolean

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• [x] The code change is tested and works locally.
• [x] There is no commented out code in this PR.
• [x] I have followed the contribution guidelines
  • [ ] This PR is for a custom-card or documentation change and therefore directed to the main branch.
  • [ ] This PR is for a official card or any other directly to the integration related change and therefore directed to the release branch.