Fixes spelling of JukesCantor label

Fixes #2. Note that this purposely leaves other files intact that
contain the same mis-spelling, specifically `cdao-deprecated-mappings.owl`.
This is because there the mis-spelling is in the term IRIs for v1.0
CDAO term IRIs. (One example why using term labels as part of term IRIs
is can be a bad idea.)

Author: hlapp

cdao.owl

@@ -1306,7 +1306,7 @@
     <!-- http://purl.obolibrary.org/obo/CDAO_0000021 -->
 
     <owl:Class rdf:about="&obo;CDAO_0000021">
-        <rdfs:label rdf:datatype="&xsd;string">JukesKantor</rdfs:label>
+        <rdfs:label rdf:datatype="&xsd;string">JukesCantor</rdfs:label>
         <rdfs:subClassOf rdf:resource="&obo;CDAO_0000020"/>
     </owl:Class>