Docs: [AEA-4409] - Update Review Date description in OAS (#3084)

Removed the statement that authorisationExpirydate is a required field
for eRD prescriptions

## Summary

- Routine Change

Co-authored-by: Jim Wild <james.wild6@nhs.net>

packages/specification/schemas/components/_extensions/MedicationRepeatInformation.yaml

@@ -16,7 +16,7 @@ properties:
           type: string
           description: |
             The review date of the prescription.
-            This is a required field for repeat and eRD prescriptions, and captures the date at which the prescriber must review the repeat medication that a patient is on.
+            This is a required field for repeat prescribing prescriptions, and captures the date at which the prescriber must review the repeat medication that a patient is on.
           enum: [authorisationExpiryDate]
         valueDateTime:
           type: string