Swap moonset and keyboard-shortcuts-inhibit keybindings

Mod+Escape is more intuitive for the session/power menu,
Super+Alt+L moves to keyboard shortcuts inhibit toggle.

README.md

@@ -176,7 +176,7 @@ greetd ─► niri (greeter instance) ─► moongreet ─► user authenticates
 | `Super+E` | File manager |
 | `Super+A` | Audio control (walker) |
 | `Super+N` | VPN manager |
-| `Super+Alt+L` | Session menu (moonset) |
+| `Mod+Escape` | Session menu (moonset) |
 | `Print` | Screenshot |
 | `Ctrl+Print` | Screenshot screen |
 | `Alt+Print` | Screenshot window |