[FSSDK-0000] update CHANGELOG for java v4.5.0

Author: muzahidul-opti

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Optimizely Java X SDK Changelog
 
+## [4.5.0]
+July 7, 2026
+
+### Fixes
+- Use attribute id instead of key for CMAB prediction requests ([#635](https://github.com/optimizely/java-sdk/pull/635))
+- Normalize decision event campaign_id, variation_id, and entity_id ([#634](https://github.com/optimizely/java-sdk/pull/634))
+- Add localHoldouts to datafile for backward compatibility ([#633](https://github.com/optimizely/java-sdk/pull/633))
+
+
 ## [4.4.2]
 May 29, 2026