Updated OVERVIEW.md to the new infos required when adding a new leaf node to the tree (#19981)
Updated OVERVIEW.md to the new infos required when adding a new leaf node to the tree (#19981)

Co-authored-by: Idriss AITHAFID <cc7f7f08956f290079b6f6771e3aa7f42c5fc371@um6p.ma>
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