chore: fix PHPStan issue

[alexislefebvre]

Q	A
Branch?	main
Tickets	.
License	MIT
Doc PR	.

Fix this error that appear in recent PRs:

Error: No error to ignore is reported on line 489.
 ------ ------------------------------------------------- 
  Line   src/Hal/Tests/Serializer/ItemNormalizerTest.php  
 ------ ------------------------------------------------- 
  489    No error to ignore is reported on line 489.      
 ------ ------------------------------------------------- 

[soyuka]

Only on main or also on 4.2 ?

[Maxcastel]

Thanks @alexislefebvre, I’m also getting this error (on main).