Documentation: add missing angle bracket in cgroup-v2 doc

Trivial addition of missing closing angle backet.
Signed-off-by: Joel Savitz <jsavitz@redhat.com>
Link: https://lore.kernel.org/r/20220422164526.3464306-1-jsavitz@redhat.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/admin-guide/cgroup-v2.rst

@@ -1881,7 +1881,7 @@ IO Latency Interface Files
   io.latency
 	This takes a similar format as the other controllers.
 
-		"MAJOR:MINOR target=<target time in microseconds"
+		"MAJOR:MINOR target=<target time in microseconds>"
 
   io.stat
 	If the controller is enabled you will see extra stats in io.stat in