update python version

Author: nicolebalmer1-nhs

azure/project.yml

@@ -5,4 +5,4 @@ variables:
   product_display_name: e-Referrals-Service
   product_description: The NHS e-RS vision is to enable local innovation and adoption of paperless referrals. To support this vision NHS Digital have created a set of APIs which provide a well-defined, simple to use data interface to the NHS e-Referral Service (e-RS). See https://digital.nhs.uk/developer/api-catalogue/e-referral-service-fhir
   spec_file: e-referrals-service-api.json
-  python_version: 3.10
+  python_version: 3.13