Update CHANGELOG.md

Author: raysuelzer

projects/ngx-angular-query-builder/CHANGELOG.md

@@ -14,4 +14,6 @@ Credit: @ravijoshi007
 ### 13.0.0
 - Angular 13 Upgrade
 ### 14.0.0
-- Angular 14 Upgrade
+- Angular 14 Upgrade
+### 15.0.0
+ - Angular 15 upgrade