fix typo

Author: sebbader-sap

documentation/IDTA-01004/modules/ROOT/pages/changelog.adoc

@@ -14,7 +14,7 @@ SPDX-License-Identifier: CC-BY-4.0
 == Changes w.r.t. V3.1 vs. V3.0.1
 
 *changed: <ReferenceAttribute> with more detailed definition in BNF Grammar and JSON Schema
-*changed: <IdentifiableObject>, <ReferableObject>, <FragmentObject>, <DescriptorObject> with more detailed definiton in BNF Grammar and JSON Schema
+*changed: <IdentifiableObject>, <ReferableObject>, <FragmentObject>, <DescriptorObject> with more detailed definition in BNF Grammar and JSON Schema
 
 
 == Changes w.r.t. V3.0.1 vs. V3.0