Fix typo in highlights

Author: khys95

release-notes-11.2

@@ -66,7 +66,7 @@ HTML header: <title>dCache 11.2 Release Notes</title>
 
 - NFS read performance improvement
 - Kafka logging for billing
-- Introduce hot file replication mechanism on pools, where the pool itself tiggers replication of hot (popular) files
+- Introduce hot file replication mechanism on pools, where the pool itself triggers replication of hot (popular) files
 
 ## Incompatibilities