Documentation: Fix inconsistent section levels in QML Maps overwiew


They cause warnings when generating Qt for Python documentation.

Pick-to: 6.12
Change-Id: Ica966d54aa60e150d6266136c1046c7c2f417861
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
commitc3968c1338276f044d442983ee2e1cadd2627c01
parent54df05f040f826375b3ad58d229e519c27378ed9
authorFriedemann Kleint <Friedemann.Kleint@qt.io>
committerFriedemann Kleint <Friedemann.Kleint@qt.io>
commit timeTue, 6 Oct 2026 09:04:03 +0000