fix typo

Author: doctorhilarius

src/components/ChallengeEditor/Copilot-Field/index.js

@@ -10,7 +10,7 @@ const CopilotField = ({ copilots, challenge, onUpdateOthers, readOnly, assignYou
   let errMessage = 'Please set a copilot'
   const handleProperty = copilots.handle ? 'handle' : 'memberHandle'
   const selectedCopilot = _.find(copilots, { [handleProperty]: challenge.copilot })
-  const selectedCopilotHandle = selectedCopilot ? selectedCopilot[handle] : undefined
+  const selectedCopilotHandle = selectedCopilot ? selectedCopilot[handleProperty] : undefined
   const copilotFee = _.find(challenge.prizeSets, p => p.type === 'copilot', [])
   const selfService = challenge.selfService