DX: fix phpstan errors

src/Bundle/ChillPersonBundle/Serializer/Normalizer/MembersEditorNormalizer.php

@@ -181,7 +181,7 @@ class MembersEditorNormalizer implements DenormalizerAwareInterface, Denormalize
     {
         if (
             null === $data['concerned'] ?? null
-            && false === ·\is_array('concerned')
+            && false === \is_array('concerned')
         ) {
             throw new Exception\UnexpectedValueException("The schema does not have any key 'concerned'");
         }