Update nerdgraph-api-workflows.mdx

[amosher-github]

Provided more clarity for the requirements to update a workflow, and improved the example to show how to do an array of channelIds

Please follow conventional commit standards
in your commit messages and pull request title.

Give us some context

• What problems does this PR solve?
• Add any context that will help us review your changes such as testing notes,
  links to related docs, screenshots, etc.
• If your issue relates to an existing GitHub issue, please link to it.

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions]

Hi @amosher-github 👋

Thanks for your pull request! Your PR is in a queue, and a writer will take a look soon. We generally publish small edits within one business day, and larger edits within three days.

We will automatically generate a preview of your request, and will comment with a link when the preview is ready (usually 10 to 20 minutes).

[netlify]

✅ Deploy Preview for docs-website-netlify ready!

Name	Link
🔨 Latest commit	bba45c2
🔍 Latest deploy log	https://app.netlify.com/sites/docs-website-netlify/deploys/663ddab9d032100008d10a94
😎 Deploy Preview	https://deploy-preview-17259--docs-website-netlify.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[nbaenam]

Hey @amosher-github, could you please sign the CLA by clicking the yellow button a few messages above this one? I'll be able to merge in as soon as you do. Thanks!

[nbaenam]

Thank you for the update! I've added a minor modification.