[FSSDK-12546] release java-sdk v4.5.0

Author: jaeopt

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Optimizely Java X SDK Changelog
 
+## [4.5.0]
+May 5, 2026
+
+### New Features
+
+**Feature Rollout**: Added support for Feature Rollouts, a new experiment type
+combining Targeted Delivery simplicity with A/B test measurement capabilities.
+Feature Rollouts enable progressive rollouts with full impact analytics, metric tracking,
+and confidence intervals.
+See [Feature Rollout docs](https://support.optimizely.com/hc/en-us/articles/45552846481037-Run-Feature-Rollouts-in-Feature-Experimentation) for more information.
+
 ## [4.4.0]
 May 4, 2026