Update create-schema-sequence.md

aw-design-diagram/create-schema-sequence.md

+```mermaid
 sequenceDiagram
 participant OCM Admin
 participant OCM Attestation Manager
   par
   OCM Admin ->> OCM Attestation Manager: Calls the POST method Schemas with relevant attributes.
   OCM Attestation Manager ->> OCM Admin: Responds with status code 201, with message 'Schema created successfully', if schema is created on ledger successfully
-  end
+  end
\ No newline at end of file
+  ```