Froehlich_CellSystems2018: fix ref (#204)

Author: dilpath

Benchmark-Models/Froehlich_CellSystems2018/model_Froehlich_CellSystems2018.xml

@@ -27,7 +27,7 @@
           </dcterms:modified>
           <bqbiol:isDescribedBy>
             <rdf:Bag>
-              <rdf:li rdf:resource="http://identifiers.org/doi/10.1126/scisignal.aat0229"/>
+              <rdf:li rdf:resource="http://identifiers.org/doi/10.1016/j.cels.2018.10.013"/>
             </rdf:Bag>
           </bqbiol:isDescribedBy>
         </rdf:Description>