fix: Updated README.md

[rameshvoodi]

what does this pr do?

fixes #1055

changes made

• replaced ember serve with npm start

[netlify[bot]]

✅ Deploy Preview for ember-website ready!

Name	Link
🔨 Latest commit	06703b7a97d9a82697a08cb810f3a411c733f86c
🔍 Latest deploy log	https://app.netlify.com/sites/ember-website/deploys/64eb3c979ca2760008df3cde
😎 Deploy Preview	https://deploy-preview-1056--ember-website.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.

[rameshvoodi]

@NullVoxPopuli Thank you, I am just amazed at your contributions!!