Update docs for request_plus changes parameter.

docs/api/paths/admin/keyspace-_changes.yaml

@@ -96,6 +96,13 @@ get:
           - longpoll
           - continuous
           - websocket
+
+    - name: request_plus
+      in: query
+      description: When true, ensures all valid documents written prior to the request being issued are included in the response.  This is only applicable for non-continuous feeds.
+      schema:
+        type: boolean
+        default: 'false'
   responses:
     '200':
       $ref: ../../components/responses.yaml#/changes-feed
@@ -156,6 +163,9 @@ post:
             feed:
               description: 'The type of changes feed to use. '
               type: string
+            request_plus:
+              description: 'When true, ensures all valid documents written prior to the request being issued are included in the response.  This is only applicable for non-continuous feeds.'
+              type: string
   responses:
     '200':
       $ref: ../../components/responses.yaml#/changes-feed