Update OpenSign API docs for contact schema changes

Updated the OpenSign API documentation to reference 'contact_res' schema and added new properties for contact details.

docs/docs/API-docs/v1.2/opensign.yaml

@@ -283,7 +283,7 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/contact'
+                $ref: '#/components/schemas/contact_res'
         "400":
           description: "Something went wrong, please try again later!"
           content:
@@ -5545,6 +5545,31 @@ components:
           $ref: '#/components/schemas/date'
       xml:
         name: contactdetails
+    contact_res:
+      type: object
+      properties:
+        name:
+          type: string
+          format: string
+          example: joe bee
+        email:
+          type: string
+          format: string
+          example: joebee@example.com
+        phone:
+          type: string
+          format: string
+          example: "4131231231"
+        company:
+          type: string
+          format: string
+          example: opensign
+        job_title:
+          type: string
+          format: string
+          example: dev
+      xml:
+        name: contactdetails 
     folder:
       type: object
       properties: