docs: attempt to disambiguate get_decoration_{above,below}

 protocol/river-window-management-v1.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/protocol/river-window-management-v1.xml b/protocol/river-window-management-v1.xml
index 608225d..444b92c 100644
--- a/protocol/river-window-management-v1.xml
+++ b/protocol/river-window-management-v1.xml
@@ -661,7 +661,7 @@
     </request>
 
     <request name="get_decoration_above">
-      <description summary="create a decoration surface above the window">
+      <description summary="create a decoration above the window in z-order">
         Create a decoration surface and assign the river_decoration_v1 role to
         the surface. The created decoration is placed above the window in
         rendering order, see the description of river_decoration_v1.
@@ -676,7 +676,7 @@
     </request>
 
     <request name="get_decoration_below">
-      <description summary="create a decoration surface below the window">
+      <description summary="create a decoration below the window in z-order">
         Create a decoration surface and assign the river_decoration_v1 role to
         the surface. The created decoration is placed below the window in
         rendering order, see the description of river_decoration_v1.