修复一处拼写错误。

app/lang/en.js

@@ -79,7 +79,7 @@ exports.content = {
   , pref_choice_mode_multiple: 'Multiple choices'
   , pref_choice_mode_single: 'Single choice'
   , pref_tab_advanced: 'Advanced'
-  , pref_tab_custom_cmd: 'Custom comand'
+  , pref_tab_custom_cmd: 'Custom commands'
   , pref_tab_general: 'General'
   , pref_tab_usage_data_title: 'Make SwitchHosts! better!'
   , pref_tab_usage_data_desc: 'Would you like to help us improve SwitchHosts! by periodically submitting anonymous usage data?'

app/version.js

@@ -1 +1 @@
-exports.version = [3,3,6,5286];
+exports.version = [3,3,6,5287];