Updated Docs url in read_me

Added new docs site to read_me

README.md

@@ -10,7 +10,7 @@
 </p>
 
 <p align="center">
-  <a href="https://vimeo.com/903381683">🎥 Watch a demo</a> | <a href="https://overmind.tech/how-it-work">📖 How it works</a> | <a href="https://app.overmind.tech/api/auth/signup">🚀 Sign up</a> | <a href="https://app.overmind.tech/playground">💻 Playground</a> | <a href="https://www.linkedin.com/company/overmindtech/">🙌 Follow us</a>
+  <a href="https://vimeo.com/903381683">🎥 Watch a demo</a> | <a href="https://docs.overmind.tech">📖 Docs</a> | <a href="https://app.overmind.tech/api/auth/signup">🚀 Sign up</a> | <a href="https://app.overmind.tech/playground">💻 Playground</a> | <a href="https://www.linkedin.com/company/overmindtech/">🙌 Follow us</a>
 </p>
 
 # What is Overmind?