chore: regens API reference docs (#889)

diff --git a/docs/dyn/appengine_v1beta.apps.operations.html b/docs/dyn/appengine_v1beta.apps.operations.html
index 12ea554..d2963ca 100644
--- a/docs/dyn/appengine_v1beta.apps.operations.html
+++ b/docs/dyn/appengine_v1beta.apps.operations.html
@@ -100,9 +100,6 @@
   An object of the form:
 
     { # This resource represents a long-running operation that is the result of a network API call.
-    "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
-      "a_key": "", # Properties of the object. Contains field @type with type URL.
-    },
     "error": { # The Status type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by gRPC (https://github.com/grpc). Each Status message contains three pieces of data: error code, error message, and error details.You can find out more about this error model and how to work with it in the API Design Guide (https://cloud.google.com/apis/design/errors). # The error result of the operation in case of failure or cancellation.
       "message": "A String", # A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
       "code": 42, # The status code, which should be an enum value of google.rpc.Code.
@@ -117,6 +114,9 @@
       "a_key": "", # Properties of the object. Contains field @type with type URL.
     },
     "name": "A String", # The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the name should be a resource name ending with operations/{unique_id}.
+    "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
   }</pre>
 </div>
 
@@ -141,9 +141,6 @@
     "nextPageToken": "A String", # The standard List next-page token.
     "operations": [ # A list of operations that matches the specified filter in the request.
       { # This resource represents a long-running operation that is the result of a network API call.
-        "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
-          "a_key": "", # Properties of the object. Contains field @type with type URL.
-        },
         "error": { # The Status type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by gRPC (https://github.com/grpc). Each Status message contains three pieces of data: error code, error message, and error details.You can find out more about this error model and how to work with it in the API Design Guide (https://cloud.google.com/apis/design/errors). # The error result of the operation in case of failure or cancellation.
           "message": "A String", # A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
           "code": 42, # The status code, which should be an enum value of google.rpc.Code.
@@ -158,6 +155,9 @@
           "a_key": "", # Properties of the object. Contains field @type with type URL.
         },
         "name": "A String", # The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the name should be a resource name ending with operations/{unique_id}.
+        "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
       },
     ],
   }</pre>