Fix vaccination record factory creating locations

This fixes an issue where creating vaccination records would end up
creating new sessions to access the team, rather than using the patient
session already available to us.

spec/factories/vaccination_records.rb

@@ -56,7 +56,7 @@
     delivery_site { "left_arm_upper_position" }
     delivery_method { "intramuscular" }
     vaccine { programme.vaccines.active.first }
-    batch { association :batch, team: session.team, vaccine: }
+    batch { association :batch, team: patient_session.team, vaccine: }
 
     performed_by