example/init: fix typo in introductory comment

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

diff --git a/example/init b/example/init
index 0e49a52..4e9b7f0 100755
--- a/example/init
+++ b/example/init
@@ -5,7 +5,7 @@
 # If you wish to edit this, you will probably want to copy it to
 # $XDG_CONFIG_HOME/river/init or $HOME/.config/river/init first.
 #
-# See the river(1), riverctl(1), and river(1) man pages for complete
+# See the river(1), riverctl(1), and rivertile(1) man pages for complete
 # documentation.
 
 # Use the "logo" key as the primary modifier