docs: fix grammar

[iiio2]

I think it would be props instead of props. with a full stop because it is just one line.

[netlify]

✅ Deploy Preview for vuejs ready!

Name	Link
🔨 Latest commit	7986693
🔍 Latest deploy log	https://app.netlify.com/sites/vuejs/deploys/672ba7246b3ea1000811003d
😎 Deploy Preview	https://deploy-preview-3096--vuejs.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.

[NataliaTepluhina]

Thank you for the pull request! Unfortunately, the period is intended there, we prefix the name with props. so foo becomes props.foo

[iiio2]

Thanks @NataliaTepluhina .