Sync changelog.md

Author: lahma

changelog.md

@@ -76,6 +76,7 @@
     * Configuration property `quartz.jobStore.dbRetryInterval` will be correctly set when constructing the Scheduler JobStore.
         * If you previously had configuration with the key `quartz.scheduler.dbFailureRetryInterval` please change to the above mentioned key.
     * DailyCalendar doesn't include first and last millisecond of day in checks (#1665)
+    * StdSchedulerFactory and derived factories are not thread-safe (#1587)
 
 ## Release 3.4.0, Mar 27 2022