Fix tests failing due to underfined ordering

This test is failing in [1] because the student ids were in a different order.

Make sure the test accepts ids in any order.

[1] - https://app.circleci.com/pipelines/github/RaspberryPiFoundation/editor-api/2948/workflows/88d009c2-3b67-46a9-8dc5-cc248bfe5df0/jobs/5600?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-checks-link&utm_content=summary

Author: zetter-rpf

spec/concepts/school_student/list_spec.rb

@@ -24,7 +24,11 @@
       described_class.call(school:, token:)
 
       # TODO: Replace with WebMock assertion once the profile API has been built.
-      expect(ProfileApiClient).to have_received(:list_school_students).with(token:, school_id: school.id, student_ids: students.map(&:id))
+      expect(ProfileApiClient).to have_received(:list_school_students).with(
+        token:,
+        school_id: school.id,
+        student_ids: match_array(students.map(&:id))
+      )
     end
 
     it 'returns a school students JSON array' do
@@ -61,7 +65,11 @@
       described_class.call(school:, token:, student_ids:)
 
       # TODO: Replace with WebMock assertion once the profile API has been built.
-      expect(ProfileApiClient).to have_received(:list_school_students).with(token:, school_id: school.id, student_ids:)
+      expect(ProfileApiClient).to have_received(:list_school_students).with(
+        token:,
+        school_id: school.id,
+        student_ids: match_array(student_ids)
+      )
     end
 
     it 'returns a filtered school students JSON array' do