Fix spec after method signature change in core (hitobito/hitobito_sac_cas#1512)

Author: daniel-illi

spec/jobs/export/event_participations_export_job_spec.rb

@@ -10,6 +10,7 @@
   subject { Export::EventParticipationsExportJob.new(format,
                                                      user.id,
                                                      event_participation_filter,
+                                                     group.id,
                                                      params.merge(filename: filename)) }
 
   let(:user) { people(:top_leader) }