Fix API catalogue

GitOrigin-RevId: 8eeddb11e3ce014bcf71d1d50f1c67448c1f7227

Author: persidskiy

Sources/MapboxMaps/Documentation.docc/API Catalogs/Layers.md

@@ -24,6 +24,7 @@
 - ``CustomLayerRenderConfiguration``
 - ``CustomLayerRenderParameters``
 - ``CustomLayerHost``
+- ``CustomLayerMapProjection``
 - ``ElevationData``
 - ``Slot``
 - ``SlotLayer``