Align with community comment on website glossary PR

And remember ClusterClaim from its time in the bikeshed :)

Signed-off-by: Laura Lorenz <lauralorenz@google.com>

Author: lauralorenz

sig-multicluster/terminology.md

@@ -6,9 +6,13 @@ For more information, see individual subprojects and documents, or the SIG-Multi
 
 ## About API
 
+### Also known as:
+
+- ClusterProperty
+
 ### Previously known as:
 
--  ClusterProperty API
+-  ClusterClaim API
 
 
 ## ClusterProfile API