Update shiny-intro.Rmd

[mortie23]

syntax error

[netlify[bot]]

✅ Deploy Preview for dreamy-noether-6227ea ready!

Name	Link
🔨 Latest commit	f16fcaf790a8a0df3255c10f5c54484651e9a101
🔍 Latest deploy log	https://app.netlify.com/sites/dreamy-noether-6227ea/deploys/663c169c64b6570008aff3ac
😎 Deploy Preview	https://deploy-preview-148--dreamy-noether-6227ea.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.

[DivadNojnarg]

Thanks!