Add the label introduced to the --idle-timeout arg

Author: NataliaIvakina

modules/ROOT/pages/tools/cypher-shell.adoc

@@ -121,7 +121,7 @@ It can also be set using the environmental variable NEO4J_CYPHER_SHELL_HISTORY.
 |false
 
 |--idle-timeout IDLE-TIMEOUT
-|Closes the application after the specified amount of idle time in interactive mode. You can specify the duration using the format `<hours>h<minutes>m<seconds>s`, for example `1h` (1 hour), `1h30m` (1 hour 30 minutes), or `30m` (30 minutes).
+|label:new[Introduced in 5.22] Closes the application after the specified amount of idle time in interactive mode. You can specify the duration using the format `<hours>h<minutes>m<seconds>s`, for example `1h` (1 hour), `1h30m` (1 hour 30 minutes), or `30m` (30 minutes).
 |disable
 |===