Add usermod help links for AR, 4LD and weather

Other usermods: 

void appendConfigData()
{
... 
 oappend(SET_F("addInfo('<modname>:help',0,'<a href=\"https:// \">Help</a>');"));
   ...
}

usermods/usermod_v2_four_line_display_ALT/usermod_v2_four_line_display_ALT.h

@@ -1036,6 +1036,7 @@ class FourLineDisplayUsermod : public Usermod {
     //}
 
     void appendConfigData() {
+      oappend(SET_F("addInfo('4LineDisplay:help',0,'<a href=\"https://moonmodules.github.io/WLED-Docs/usermods/four-line-display\">Help</a>');"));  // 0 is field type, 1 is actual field
       oappend(SET_F("dd=addDropdown('4LineDisplay','type');"));
       oappend(SET_F("addOption(dd,'None',0);"));
       oappend(SET_F("addOption(dd,'SSD1306',1);"));