Trim whitespace

Author: tdroza-nhs

src/cloudevents/domains/digital-letters/2025-10-draft/events/uk.nhs.notify.digital.letters.messages.request.sent.v1.schema.yaml

@@ -11,7 +11,7 @@ properties:
   source:
     type: string
     pattern: ^/nhs/england/notify/(production|staging|development|uat)/(primary|secondary|dev-[0-9]+)/data-plane/digitalletters/messages
-    description: Event source for digital letters .
+    description: Event source for digital letters.
 
   dataschema:
     type: string