protocol: improve more toplevel summaries

 protocol/river-layer-shell-v1.xml  | 2 +-
 protocol/river-xkb-bindings-v1.xml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/protocol/river-layer-shell-v1.xml b/protocol/river-layer-shell-v1.xml
index b6cf41b..9caaba5 100644
--- a/protocol/river-layer-shell-v1.xml
+++ b/protocol/river-layer-shell-v1.xml
@@ -23,7 +23,7 @@
     IN THE SOFTWARE.
   </copyright>
 
-  <description summary="layer shell support for river">
+  <description summary="optional layer shell support">
     This protocol allows the river-window-management-v1 window manager to
     support the wlr-layer-shell-v1 protocol.
 
diff --git a/protocol/river-xkb-bindings-v1.xml b/protocol/river-xkb-bindings-v1.xml
index a83c5f5..de4f100 100644
--- a/protocol/river-xkb-bindings-v1.xml
+++ b/protocol/river-xkb-bindings-v1.xml
@@ -23,7 +23,7 @@
     IN THE SOFTWARE.
   </copyright>
 
-  <description summary="define xkbcommon-based key bindings">
+  <description summary="xkbcommon-based key bindings">
     This protocol allows the river-window-management-v1 window manager to
     define key bindings in terms of xkbcommon keysyms and other configurable
     properties.