Replace deprecated CLLocationManagerDelegate method

The deprecation warning in Xcode wasn't informative, but the deprecation
annotation suggested what to do:

```
/*
 *  locationManager:didChangeAuthorizationStatus:
 *
 *  Discussion:
 *    Invoked when the authorization status changes for this application.
 */
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status API_DEPRECATED_WITH_REPLACEMENT("-locationManagerDidChangeAuthorization:", ios(4.2, 14.0), macos(10.7, 11.0), watchos(1.0, 7.0), tvos(9.0, 14.0));
```

Author: mokagio

WordPress/Classes/Utility/LocationService.m

@@ -201,8 +201,9 @@ - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray
     [self getAddressForLocation:location];
 }
 
-- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
+- (void)locationManagerDidChangeAuthorization:(CLLocationManager *)manager
 {
+    CLAuthorizationStatus status = manager.authorizationStatus;
     if (status == kCLAuthorizationStatusRestricted || status == kCLAuthorizationStatusDenied) {
         [self serviceFailed:[NSError errorWithDomain:LocationServiceErrorDomain code:LocationServiceErrorPermissionDenied userInfo:nil]];
     }