chore: update docs/dyn , add static discovery files to discovery_cache/documents (#1111)

This PR was generated using Autosynth. :rainbow:

Synth log will be available here:
https://source.cloud.google.com/results/invocations/78f53313-0c78-4a29-8841-f031665a4c6a/targets

- [ ] To automatically regenerate this PR, check this box.

Source-Link: https://github.com/googleapis/synthtool/commit/c2de32114ec484aa708d32012d1fa8d75232daf5
diff --git a/docs/dyn/chat_v1.spaces.messages.attachments.html b/docs/dyn/chat_v1.spaces.messages.attachments.html
index 804d168..b723b60 100644
--- a/docs/dyn/chat_v1.spaces.messages.attachments.html
+++ b/docs/dyn/chat_v1.spaces.messages.attachments.html
@@ -105,13 +105,13 @@
     "driveDataRef": { # A reference to the data of a drive attachment. # A reference to the drive attachment. This is used with the Drive API.
       "driveFileId": "A String", # The id for the drive file, for use with the Drive API.
     },
+    "contentType": "A String", # The content type (MIME type) of the file.
     "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Bots should not use this URL to download attachment content.
+    "contentName": "A String", # The original file name for the content, not the full path.
+    "name": "A String", # Resource name of the attachment, in the form "spaces/*/messages/*/attachments/*".
     "attachmentDataRef": { # A reference to the data of an attachment. # A reference to the attachment data. This is used with the media API to download the attachment data.
       "resourceName": "A String", # The resource name of the attachment data. This is used with the media API to download the attachment data.
     },
-    "name": "A String", # Resource name of the attachment, in the form "spaces/*/messages/*/attachments/*".
-    "contentType": "A String", # The content type (MIME type) of the file.
-    "contentName": "A String", # The original file name for the content, not the full path.
     "source": "A String", # The source of the attachment.
   }</pre>
 </div>