Fix merged-notification workflow

[JasonEtco]

Why:

Closes #97

What's being changed:

When I modified this workflow's message, I didn't properly escape the ` characters in the code block 🙈

Check off the following:

• All of the tests are passing.
• I have reviewed my changes in staging.
• For content changes, I have reviewed the localization checklist
• For content changes, I have reviewed the Content style guide for GitHub Docs.

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[zeke]

👍🏼

[github-actions]

Thanks very much for contributing! Your pull request has been merged 🎉 You should see your changes appear on the site in approximately 24 hours. To add your ✨ contribution to the README.md, create a new comment in this PR with:

@all-contributors please add @JasonEtco for docs

If you want to, you can use the emoji key to replace docs with a different contribution type.

[allcontributors]

@github-actions[bot]

I could not determine your intention.

Basic usage: @all-contributors please add @Someone for code, doc and infra

For other usages see the documentation