Documentation/scheduler: Fix typo in sched-stats domain field description

Fixes a typo in the description of the 23rd field of the scheduling
domain statistics, which was missing the word "cpu".

Fixes: 7c8cd56 ("docs: Update Schedstat version to 17")
Signed-off-by: Madadi Vineeth Reddy <vineethr@linux.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250520100752.39921-1-vineethr@linux.ibm.com>

Author: vineethribm

Documentation/scheduler/sched-stats.rst

@@ -135,7 +135,7 @@ of idleness (busy, idle and newly idle):
         cpu was idle but no busier group was found
 
     23) # of times in this domain sched_balance_rq() was called when the
-        was just becoming idle
+        cpu was just becoming idle
     24) # of times in this domain sched_balance_rq() checked but found the
         load did not require balancing when the cpu was just becoming idle
     25) # of times in this domain sched_balance_rq() tried to move one or more