Fix typo in publish_apk.py

sky/tools/publish_apk.py

 #!/usr/bin/env python
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Modeled on examples from:
 # https://github.com/googlesamples/android-play-publisher-api/tree/master/v2/python
 
 import argparse
 import httplib2
@@ skipping 39 matching lines @@
         track=track,
         packageName=package_name,
         body={u'versionCodes': [apk_response['versionCode']]}).execute()
 
     print 'Track %s is set for version code(s) %s' % (
         track_response['track'], str(track_response['versionCodes']))
 
     listing_response = service.edits().apklistings().update(
         editId=edit_id, packageName=package_name, language='en-US',
         apkVersionCode=apk_response['versionCode'],
-        body={'recentChanges': changes}).execute()
+        body={'recentChanges': changes_text}).execute()
 
     print ('Listing for language %s was updated.'
            % listing_response['language'])
 
     commit_request = service.edits().commit(
         editId=edit_id, packageName=package_name).execute()
 
     print 'Edit "%s" has been committed' % (commit_request['id'])
 
 
@@ skipping 28 matching lines @@
   try:
     publish_apk(service, args.package_name, args.apk_path, changes_text,
         args.track)
   except client.AccessTokenRefreshError:
     print ('The credentials have been revoked or expired, please re-run the '
            'application to re-authorize')
 
 
 if __name__ == '__main__':
   main(sys.argv)