Edit regex to allow space in phone numbers

Allowing to set multiple phone in one case, separed by space, but still digits only

src/Form/Type/PhoneType.php

@@ -13,7 +13,7 @@ class PhoneType extends AbstractType
     {
         $resolver->setDefaults([
             'constraints' => [
-                new Regex('/^[0-9]*$/', 'form_constraint_digit_only')
+                new Regex('/^[0-9 ]*$/', 'form_constraint_digit_only')
             ],
             'attr' => ['placeholder' => 'form_placeholder_phone'],
             'help' => 'form_help_phone',