Fixing Spelling Mistake in rculist_nulls.rst

[Vyshnav Ajith]

NUll is a special marker and not maker I believe. Fixing typo with this patch. 

Signed-off-by: Vyshnav Ajith <puthen1977@xxxxxxxxx>
---
 Documentation/RCU/rculist_nulls.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst
index 21e40fcc08de..88bce14b3c37 100644
--- a/Documentation/RCU/rculist_nulls.rst
+++ b/Documentation/RCU/rculist_nulls.rst
@@ -13,7 +13,7 @@ Please read the basics in listRCU.rst.
 Using 'nulls'
 =============
 
-Using special makers (called 'nulls') is a convenient way
+Using special markers (called 'nulls') is a convenient way
 to solve following problem.
 
 Without 'nulls', a typical RCU linked list managing objects which are
-- 
2.43.0