Fix contributors output

Author: andrewsayre

action.yml

@@ -71,6 +71,8 @@ inputs:
 outputs:
   changelog:
     description: The built release changelog built from the merged pull requests
+  contributors:
+    description: A comma separated list of contributors (GitHub usernames) who contributed to the release
   pull_requests:
     description: A comma seperated list of PR numbers that were merged
   owner:

dist/index.js

@@ -204,7 +204,7 @@ export function buildChangelog(diffInfo: DiffInfo, origPrs: PullRequestInfo[], o
   const contributorsArray = Array.from(contributorsSet)
   const contributorsString = contributorsArray.join(', ')
   const externalContributorString = contributorsArray.filter(value => value !== `@${options.owner}`).join(', ')
-  core.setOutput('contributors', JSON.stringify(contributorsSet))
+  core.setOutput('contributors', contributorsArray.join(','))
 
   const releaseNotesTemplateContext = buildReleaseNotesTemplateContext(
     changelogStrings,