mm: memcontrol: fix a typo in comment

Fix a spelling mistake in comment.

Link: https://lkml.kernel.org/r/20220815065102.74347-1-xu.panda@zte.com.cnReported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: Nxupanda <xu.panda@zte.com.cn>
Signed-off-by: NCGEL ZTE <cgel.zte@gmail.com>
Reviewed-by: NMukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

mm/memcontrol.c

@@ -1143,7 +1143,7 @@ static void invalidate_reclaim_iterators(struct mem_cgroup *dead_memcg)
 	} while ((memcg = parent_mem_cgroup(memcg)));
 
 	/*
-	 * When cgruop1 non-hierarchy mode is used,
+	 * When cgroup1 non-hierarchy mode is used,
 	 * parent_mem_cgroup() does not walk all the way up to the
 	 * cgroup root (root_mem_cgroup). So we have to handle
 	 * dead_memcg from cgroup root separately.