Fix `OwlViTForObjectDetection.image_guided_detection` doc example
# What does this PR do?

Need to update expected values after #23157
_The documentation is not available anymore as the PR was closed or merged._<|||||>@amyeroberts I know you actually want to give the approval but forgot doing it 😅 .
As I am a serious man, I would try not to merge without a format approval 🙏 