[3.13] gh-123621: Fix `datamodel.rst` with proper `dict` notation (GH-123648) (#123653)

gh-123621: Fix `datamodel.rst` with proper `dict` notation (GH-123648)
(cherry picked from commit cfbc841ef3c27b3e65d1223bf8fedf1f652137bc)

Co-authored-by: Lipták Attila (Flash) <113017309+AttilaLiptak@users.noreply.github.com>
1 file changed