Add shortcut for Rocket.Chat

Install/Templates/config/i3/config

@@ -216,6 +216,7 @@ bindsym $mod+Ctrl+k exec keepassxc
 bindsym $mod+Ctrl+a exec atril
 bindsym $mod+Ctrl+m exec mumble
 bindsym $mod+Ctrl+n exec nautilus
+bindsym $mod+Ctrl+r exec flatpak run chat.rocket.RocketChat
 
 # auto set workspace
 for_window [class="Firefox"] move container to workspace 1