update changelog

Author: philprime

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Add attributes data to `SentryScope` (#6830)
 - Add `SentryScope` attributes into log messages (#6834)
 - Add integration to collect Metrics (#6956)
+- Add `Sentry.metrics.count(..)`, `Sentry.metrics.distribution(..)` and `Sentry.metrics.gauge(..)` to public API (#6957)
 
 ## 9.0.0