chore: regens API reference docs (#889)

diff --git a/docs/dyn/cloudsearch_v1.media.html b/docs/dyn/cloudsearch_v1.media.html
index f843c28..db3666c 100644
--- a/docs/dyn/cloudsearch_v1.media.html
+++ b/docs/dyn/cloudsearch_v1.media.html
@@ -83,18 +83,26 @@
   <pre>Uploads media for indexing.
 
 The upload endpoint supports direct and resumable upload protocols and
-is intended for large items that can not be inlined during index requests. To
-index large content:
+is intended for large items that can not be
+[inlined during index requests](https://developers.google.com/cloud-search/docs/reference/rest/v1/indexing.datasources.items#itemcontent).
+To index large content:
 
-1. Call upload to begin
-   a session and get the item reference.
-1. Upload the content using the item reference's resource name.
-1. Call index with the item
-   reference as the content.
+1. Call
+   indexing.datasources.items.upload
+   with the resource name to begin an upload session and retrieve the
+   UploadItemRef.
+1. Call media.upload to upload the content using the same resource name from step 1.
+1. Call indexing.datasources.items.index
+   to index the item. Populate the
+   [ItemContent](/cloud-search/docs/reference/rest/v1/indexing.datasources.items#ItemContent)
+   with the UploadItemRef from step 1.
+
 
 For additional information, see
 [Create a content connector using the REST API](https://developers.google.com/cloud-search/docs/guides/content-connector#rest).
 
+  **Note:** This API requires a service account to execute.
+
 Args:
   resourceName: string, Name of the media that is being downloaded.  See
 ReadRequest.resource_name. (required)