Merge pull request #13804 from mrdoob/docs-morphtargetdictionary-type

Docs: Fix type of mesh.morphTargetDictionary

docs/api/objects/Mesh.html

@@ -76,7 +76,7 @@
 		Undefined by default, but reset to a blank array by [page:Mesh.updateMorphTargets updateMorphTargets].
 		</div>
 
-		<h3>[property:Array morphTargetDictionary]</h3>
+		<h3>[property:Object morphTargetDictionary]</h3>
 		<div>
 		A dictionary of morphTargets based on the morphTarget.name property.
 		Undefined by default, but rebuilt [page:Mesh.updateMorphTargets updateMorphTargets].