docs: update command registration and visibility titles

Author: NonSwag

content/docs/commander/hide-reveal.mdx

@@ -1,5 +1,5 @@
 ---
-title: Hiding/Revealing Commands
+title: Command Visibility
 description: Control command visibility in tab completion
 ---
 

content/docs/commander/unregister-register.mdx

@@ -1,9 +1,9 @@
 ---
-title: Un-/registering Commands
+title: Command Registration
 description: Completely remove or restore commands from the server
 ---
 
-# Un-/registering Commands
+# Unregistering Commands
 
 Unregistering a command allows you to completely remove commands from the server.  
 Unlike hiding, unregistered commands cannot be executed by anyone.