example/init: use Mod+Shift E for exit

I keep hitting Mod+E when testing because of colemak.

 example/init | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/example/init b/example/init
index 4e9b7f0..44532c4 100755
--- a/example/init
+++ b/example/init
@@ -18,7 +18,7 @@ riverctl map normal $mod+Shift Return spawn foot
 riverctl map normal $mod Q close
 
 # Mod+E to exit river
-riverctl map normal $mod E exit
+riverctl map normal $mod+Shift E exit
 
 # Mod+J and Mod+K to focus the next/previous view in the layout stack
 riverctl map normal $mod J focus-view next