🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

google-shopping-merchant-data_sources-v1beta/proto_docs/google/shopping/merchant/datasources/v1beta/datasourcetypes.rb

@@ -82,8 +82,10 @@ class PrimaryProductDataSource
  # To link the data source to the default rule, you need to add a
  # new reference to this list (in sequential order).
  #
- # To unlink the data source from the default rule, you need to
- # remove the given reference from this list.
+ # To unlink the data source from the default rule, you need to remove the
+ # given reference from this list. To create attribute rules that are
+ # different from the default rule, see [Set up your attribute
+ # rules](//support.google.com/merchants/answer/14994083).
  #
  # Changing the order of this list will result in changing the priority of
  # data sources in the default rule.
@@ -117,7 +119,12 @@ module Channel
  end
  end
 
- # The supplemental data source for local and online products.
+ # The supplemental data source for local and online products. Supplemental API
+ # data sources must not have `feedLabel` and `contentLanguage` fields set. You
+ # can only use supplemental data sources to update existing products. For
+ # information about creating a supplemental data source, see [Create a
+ # supplemental data source and link it to the primary data
+ # source](/merchant/api/guides/data-sources/overview#create-supplemental-data-source).
  # @!attribute [rw] feed_label
  # @return [::String]
  # Optional. Immutable. The feed label that is specified on the data source