DOCS-2317 demoralized to denormalized

Author: kay-kim

source/core/data-model-operations.txt

@@ -35,7 +35,7 @@ models should avoid document growth when possible.
 For instance, if your applications require updates that will cause
 document growth, you may want to refactor your data model to use
 references between data in distinct documents rather than a
-demoralized data model.
+denormalized data model.
 
 MongoDB adaptively adjusts the amount of automatic padding to reduce
 occurrences of relocation. You may also use a *pre-allocation*