Update CHANGELOG.md (#3290)

Author: ahmedetefy

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 - "You miss 100 percent of the chances you don't take. — Wayne Gretzky" — Michael Scott
 
+## 6.2.1
+
+- [core] fix: Moves SDK metadata-setting into the `NodeClient/BrowserClient` to protect it from being overwritten by other classes extending `BaseClient` like @sentry/serverless (#3279)
+
 ## 6.2.0
 
 - [tracing] feat: Mongoose tracing support added to MongoDB (#3252)