doc: cgroup: improve formatting

Fix tabs vs spaces issue which cases the line to be considered
a new list entry.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lore.kernel.org/r/20200228000653.1572553-2-kuba@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/admin-guide/cgroup-v2.rst

@@ -1103,7 +1103,7 @@ PAGE_SIZE multiple when read back.
 	proportionally to the overage, reducing reclaim pressure for
 	smaller overages.
 
-       Effective min boundary is limited by memory.min values of
+	Effective min boundary is limited by memory.min values of
 	all ancestor cgroups. If there is memory.min overcommitment
 	(child cgroup or cgroups are requiring more protected memory
 	than parent will allow), then each child cgroup will get