Update README.md

README.md

@@ -28,7 +28,7 @@ Every two weeks, the Cloud Native Global Black Belt team at Microsoft will hold
 
 **2021 Upcoming Meetings**:
 
-- Thursday September 9th 11 am Central Time (CST) - TBD
+- Thursday September 9th 11 am Central Time (CST) - Chaos Mesh with AKS
 - Thursday September 23rd 11 am Central Time (CST) - BoatBox AKS Health Check
 - Thursday October 7th 11 am Central Time (CST) - Windows Container deep dive on AKS