Update CHANGELOG.md

Author: evansims

CHANGELOG.md

@@ -4,7 +4,11 @@
 
 ### [0.7.0](https://github.com/openfga/js-sdk/compare/v0.6.3...v0.7.0) (2024-08-30)
 
-- feat: enhancements to OpenTelemetry support (#149)
+- feat!: enhancements to OpenTelemetry support (#149)
+
+BREAKING CHANGE:
+
+This version changes the way in which telemetry is configured and reported. See #149 for additional information.
 
 ## v0.6.3