OpenApi: anyOf must contains an array, not an object

[Cafeine42]

API Platform version(s) affected: since 4.2.
Description
The schema currently defines some anyOf as an object instead of an array, which is invalid.

How to reproduce
Reproduce an Entity with this type of fields :

Additional Context
I use docker run --rm -it -v $(pwd):/tmp stoplight/spectral:6 lint /tmp/openapi.yaml to automatically check my specification.

[Cafeine42]

#7399 is merged. I close.