Documentation: Fix typos found in cgroup-v2.rst

Fix typos found in Documentation/admin-guide/cgroup-v2.rst.

Signed-off-by: Jiang Biao <benbjiang@tencent.com>
Link: https://lore.kernel.org/r/20210107141118.9530-1-benbjiang@tencent.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
1 file changed