chore: booleans not strings in pr.yml

Author: tstephen-nhs

.github/workflows/pull_request.yml

@@ -142,8 +142,8 @@ jobs:
       BLOCKED_SITE_ODS_CODES: "XXXXX"
       NOTIFY_ROUTING_PLAN_ID: "e57fe5cc-0567-4854-abe2-b7dd9014a50c"
       NOTIFY_API_BASE_URL: "https://int.api.service.nhs.uk"
-      ENABLE_NOTIFICATIONS_EXTERNAL: "false"
-      ENABLE_NOTIFICATIONS_INTERNAL: "true"
+      ENABLE_NOTIFICATIONS_EXTERNAL: false
+      ENABLE_NOTIFICATIONS_INTERNAL: true
       TEST_PRESCRIPTIONS_1: ${{ vars.TEST_PRESCRIPTIONS_1_VALUES }}
       TEST_PRESCRIPTIONS_2: ${{ vars.TEST_PRESCRIPTIONS_2_VALUES }}
       TEST_PRESCRIPTIONS_3: ${{ vars.TEST_PRESCRIPTIONS_3_VALUES }}