fix: parse scheduleCodeWorkflowIDs instead of scheduleCodeWorkflowID

[jamieu]

trafficstars

Parse scheduleCodeWorkflowIDs instead of scheduleCodeWorkflowID for Hackney Council

Use the first element of scheduleCodeWorkflowIDs (plural) in place of scheduleCodeWorkflowID

Refs: #1267

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.93%. Comparing base (423ceb7) to head (16ef936). Report is 18 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1268   +/-   ##
=======================================
  Coverage   87.93%   87.93%           
=======================================
  Files           9        9           
  Lines        1111     1111           
=======================================
  Hits          977      977           
  Misses        134      134           

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