Update src/main/resources/io/jenkins/plugins/pipelinegraphview/Messages_it.properties

Co-authored-by: Mark Waite <mark.earl.waite@gmail.com>

Author: timja

src/main/resources/io/jenkins/plugins/pipelinegraphview/Messages_it.properties

@@ -26,7 +26,7 @@ noBuilds=Nessuna build
 Util.millisecond={0} ms
 Util.second={0} s
 Util.minute={0} min
-Util.hour  ={0} h
+Util.hour  ={0} o
 Util.day   ={0} {0,choice,0#giorni|1#giorno|1<giorni}
 Util.month ={0} m
 Util.year  ={0} a