[PATCH mm-unstable] Docs/admin-guide/mm/numaperf: change title to fix duplicate label warning

[SeongJae Park]

Commit 1564fac284b1 ("Docs/admin-guide/mm/numaperf: increase depth of
subsections") in mm-unstable titled numaperf.rst as 'NUMA Performance'.
The name overlaps with an existing subsection title of the document, so
sphinx makes below warning.

    linux/Documentation/admin-guide/mm/numaperf.rst:68: WARNING: duplicate label admin-guide/mm/numaperf:numa performance, other instance in linux/Documentation/admin-guide/mm/numaperf.rst

Fix the warning by changing the title of the document to 'NUMA Memory
Performance'.  It may look more consistent with its sibling document,
'NUMA Memory Policy'.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Fixes: 1564fac284b1 ("Docs/admin-guide/mm/numaperf: increase depth of subsections") in mm-unstable
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
---
 Documentation/admin-guide/mm/numaperf.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst
index 27868797621c..544a6d16c801 100644
--- a/Documentation/admin-guide/mm/numaperf.rst
+++ b/Documentation/admin-guide/mm/numaperf.rst
@@ -1,8 +1,8 @@
 .. _numaperf:
 
-================
-NUMA Performance
-================
+=======================
+NUMA Memory Performance
+=======================
 
 NUMA Locality
 =============
-- 
2.25.1