Documentation: kernel-parameters: add missing '<'

Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210127104343.5647-1-wsa+renesas@sang-engineering.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/admin-guide/kernel-parameters.rst

@@ -60,7 +60,7 @@ Note that for the special case of a range one can split the range into equal
 sized groups and for each group use some amount from the beginning of that
 group:
 
-	<cpu number>-cpu number>:<used size>/<group size>
+	<cpu number>-<cpu number>:<used size>/<group size>
 
 For example one can add to the command line following parameter: