docs: Fix formatting of request arg in docstring (#352)

* docs: Fix formatting of request arg in docstring

chore: Update gapic-generator-python to v1.9.1
PiperOrigin-RevId: 518604533

Source-Link: googleapis/googleapis@8a085ae

Source-Link: googleapis/googleapis-gen@b2ab4b0
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiYjJhYjRiMGEwYWUyOTA3ZTgxMmMyMDkxOThhNzRlMDg5OGFmY2IwNCJ9

* 🦉 Updates from OwlBot post-processor

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

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

google/cloud/recaptchaenterprise_v1/services/recaptcha_enterprise_service/async_client.py

@@ -1597,8 +1597,8 @@ async def sample_search_related_account_group_memberships():
 
         Args:
             request (Optional[Union[google.cloud.recaptchaenterprise_v1.types.SearchRelatedAccountGroupMembershipsRequest, dict]]):
-                The request object. The request message to search
-                related account group memberships.
+                The request object. The request message to search related
+                account group memberships.
             project (:class:`str`):
                 Required. The name of the project to
                 search related account group memberships

google/cloud/recaptchaenterprise_v1/services/recaptcha_enterprise_service/client.py

@@ -1881,8 +1881,8 @@ def sample_search_related_account_group_memberships():
 
         Args:
             request (Union[google.cloud.recaptchaenterprise_v1.types.SearchRelatedAccountGroupMembershipsRequest, dict]):
-                The request object. The request message to search
-                related account group memberships.
+                The request object. The request message to search related
+                account group memberships.
             project (str):
                 Required. The name of the project to
                 search related account group memberships