Update fp-005-delineated-content.md summary fix (#2879)

Author: nataled

principles/fp-005-delineated-content.md

@@ -10,7 +10,7 @@ The wording of this principle is still in progress, with some issues still to be
 
 ## Summary
 
-The scope of an ontology is the extent of the domain or subject matter it intends to cover. The ontology must have a clearly specified scope and content that adheres to that scope.
+The scope of an ontology is the extent of the domain or subject matter it intends to cover. The ontology MUST have a clearly specified scope and content that adheres to that scope.
 
 ## Purpose