Readme/update hello rasa community

[profrodai]

Proposed changes:
Updating README.md to highlight Hello Rasa and Agent Engineering community

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
13 out of 14 committers have signed the CLA.

✅ sanchariGr
✅ m-vdb
✅ eltociear
✅ varunshankar
✅ Tawakalt
✅ ancalita
✅ Urkem
✅ rasabot
✅ rasa-jmac
✅ amn41
✅ rasa-aadlv
✅ profrodai
✅ miraai
❌ Element9
_{You have signed the CLA already but the status is still pending? Let us recheck it.}