Update changelog for client report discard reason

Switch client report discard reason for HTTP 4xx/5xx errors.

Author: adinauer

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 - Fix crash when unregistering `SystemEventsBroadcastReceiver` with try-catch block. ([#5106](https://github.com/getsentry/sentry-java/pull/5106))
 - Log an actionable error message when Relay returns HTTP 413 (Content Too Large) ([#5115](https://github.com/getsentry/sentry-java/pull/5115))
+  - Also switch the client report discard reason for all HTTP 4xx/5xx errors (except 429) from `network_error` to `send_error`
 
 ## 8.33.0