Update Activate vector search image

[mdubus]

On the Cloud, the experimental features have been enhanced with a description + their title have evolved a bit.
We may want to update the image here accordingly: https://www.meilisearch.com/docs/learn/experimental/vector_search#activate-vector-search

Before:

After:

[curquiza]

⚠️ do it once v1.7.0 is out because scoreDetails will not be part of the exp features anymore