Update repair.md
Adding link to IAO property
# Repair
-ROBOT can repair certain problems encountered in ontologies. So far, this is limited to updating axioms pointing to deprecated classes with their replacement class.
+ROBOT can repair certain problems encountered in ontologies. So far, this is limited to updating axioms pointing to deprecated classes with their replacement class (indicated using [term replaced by](http://purl.obolibrary.org/obo/IAO_0100001)).
robot repair \
--input need-of-repair.owl \
--output results/repaired.owl
+
