Update meta dependency + documentation for the `locationAlways` permission

permission_handler_platform_interface/CHANGELOG.md

 ## 3.6.1
 
 * Updated `meta` dependency to version `^1.3.0`.
+* Updated documentation for the `locationAlways` permission
 
 ## 3.6.0
 

permission_handler_platform_interface/lib/src/permissions.dart

@@ -39,6 +39,11 @@ class Permission {
   ///   When running on Android < Q: Fine and Coarse Location
   ///   When running on Android Q and above: Background Location Permission
   /// iOS: CoreLocation - Always
+  ///   When requesting this permission the user needs to grant permission
+  ///   for the `locationWhenInUse` permission first, clicking on
+  ///   the `Àllow While Using App` option on the popup.
+  ///   After allowing the permission the user can request the `locationAlways`
+  ///   permission and can click on the `Change To Always Allow` option.
   static const locationAlways = PermissionWithService._(4);
 
   /// Android: Fine and Coarse Location