Update event-driven-architecture.md

[azarboon]

trafficstars

Describe your changes

This page should (at least briefly) mention the main challenges of EDA so readers are informed. I've added two main challenges.

Related issue number or link (ex: resolves #issue-number)

Checklist before opening this PR (put x in the checkboxes)

• [x] This PR does not contain plagiarism
  • don’t copy other people’s work unless you are quoting and contributing it to them.
• [x] I have signed off on all commits
  • signing off (ex: git commit -s) is to affirm that commits comply DCO. If you are working locally, you could add an alias to your gitconfig by running git config --global alias.ci "commit -s".

[netlify[bot]]

✅ Deploy Preview for cncfglossary ready!

Name	Link
🔨 Latest commit	b00ded87778f53ff63d87d601e7dba8384c340ed
🔍 Latest deploy log	https://app.netlify.com/sites/cncfglossary/deploys/6703692f7700f600083f2985
😎 Deploy Preview	https://deploy-preview-3318--cncfglossary.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.

[nate-double-u]

Hi @azarboon, sorry for the delay in review.

In addition to @iamNoah1's comments above, we can't accept this update as it breaks our definition template.