OWASP Slack invite link added

README.md

@@ -5,9 +5,10 @@ The IoTGoat Project is a deliberately insecure firmware based on OpenWrt. The pr
  ![IoT Top 10 2018](/images/OWASP-IoT-Top-10-2018-final.jpg)
 
 
-To get started with developing IoTGoat challenges, review the [Build Environment guidance](BuildEnvironment.md) page. If a crucial challenge idea is missing, please reach out to the project leaders below. Be sure to join the OWASP Slack team, then join the #iot-security for news on upcoming project meetings and updates.
+To get started with developing IoTGoat challenges, review the [Build Environment Guidance](BuildEnvironment.md) page. If a crucial challenge idea is missing, please reach out to the project leaders below. Be sure to join the [OWASP Slack team](https://join.slack.com/t/owasp/shared_invite/enQtNDI5MzgxMDQ2MTAwLTEyNzIzYWQ2NDZiMGIwNmJhYzYxZDJiNTM0ZmZiZmJlY2EwZmMwYjAyNmJjNzQxNzMyMWY4OTk3ZTQ0MzFhMDY), then join the **#iot-security** for news on upcoming project meetings and updates.
 
 #### Project leaders
-Aaron Guzman @scriptingxss <br>
-Fotios Chantzis <br>
-Paulino Calderon
+
+* Aaron Guzman (@scriptingxss)
+* Fotios Chantzis
+* Paulino Calderon