Fix spelling mistake in user-upload documentation

Change-Id: Id1b372d8e54d8d57fe02ca678cca94e755b85484
Signed-off-by: Edwin Kempin <edwin.kempin@gmail.com>
diff --git a/Documentation/user-upload.txt b/Documentation/user-upload.txt
index 4a137e4..f8d7357 100644
--- a/Documentation/user-upload.txt
+++ b/Documentation/user-upload.txt
@@ -192,8 +192,8 @@
 For more about Change-Ids, see link:user-changeid.html[Change-Id Lines].
 
 [[manual_replacement_mapping]]
-Manual Replacment Mapping
-^^^^^^^^^^^^^^^^^^^^^^^^^
+Manual Replacement Mapping
+^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .Deprecation Warning
 ****