chore(changelog): Add 8.43.3 hotfix (#5620)

Add release notes for version 8.43.3 with fixes.

Author: romtsn

CHANGELOG.md

@@ -64,6 +64,12 @@
 - Fix attachments being duplicated on native events that carry scope attachments ([#5548](https://github.com/getsentry/sentry-java/pull/5548))
 - Fix performance collector scheduling many tasks in a row ([#5524](https://github.com/getsentry/sentry-java/pull/5524))
 
+## 8.43.3
+
+### Fixes
+
+- Fix crash when `getHistoricalProcessStartReasons` is called from an isolated or wrong-userId process ([#5597](https://github.com/getsentry/sentry-java/pull/5597))
+
 ## 8.43.2
 
 ### Improvements