Documenation: update cgroup's document path

cgroup's document path is changed to "cgroup-v1". update it.

Signed-off-by: seokhoon.yoon <iamyooon@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/cgroup-v1/memcg_test.txt b/Documentation/cgroup-v1/memcg_test.txt
index 8870b02..896a180 100644
--- a/Documentation/cgroup-v1/memcg_test.txt
+++ b/Documentation/cgroup-v1/memcg_test.txt
@@ -6,7 +6,7 @@
 is complex. This is a document for memcg's internal behavior.
 Please note that implementation details can be changed.
 
-(*) Topics on API should be in Documentation/cgroups/memory.txt)
+(*) Topics on API should be in Documentation/cgroup-v1/memory.txt)
 
 0. How to record usage ?
    2 objects are used.
@@ -256,7 +256,7 @@
 
 	You can see charges have been moved by reading *.usage_in_bytes or
 	memory.stat of both A and B.
-	See 8.2 of Documentation/cgroups/memory.txt to see what value should be
+	See 8.2 of Documentation/cgroup-v1/memory.txt to see what value should be
 	written to move_charge_at_immigrate.
 
  9.10 Memory thresholds