chore: Update discovery artifacts (#1412)

## Deleted keys were detected in the following pre-stable discovery artifacts:
managedidentities v1alpha1 https://github.com/googleapis/google-api-python-client/commit/0927c1989574ae4272e4f753f4d55c88af62d8f2
managedidentities v1beta1 https://github.com/googleapis/google-api-python-client/commit/0927c1989574ae4272e4f753f4d55c88af62d8f2

## Discovery Artifact Change Summary:
feat(managedidentities): update the api https://github.com/googleapis/google-api-python-client/commit/0927c1989574ae4272e4f753f4d55c88af62d8f2
diff --git a/docs/dyn/managedidentities_v1beta1.projects.locations.html b/docs/dyn/managedidentities_v1beta1.projects.locations.html
index 3ae657c..2d2a5ed 100644
--- a/docs/dyn/managedidentities_v1beta1.projects.locations.html
+++ b/docs/dyn/managedidentities_v1beta1.projects.locations.html
@@ -131,7 +131,7 @@
 Args:
   name: string, The resource that owns the locations collection, if applicable. (required)
   filter: string, A filter to narrow down results to a preferred subset. The filtering language accepts strings like "displayName=tokyo", and is documented in more detail in [AIP-160](https://google.aip.dev/160).
-  pageSize: integer, The maximum number of results to return. If not set, the service will select a default.
+  pageSize: integer, The maximum number of results to return. If not set, the service selects a default.
   pageToken: string, A page token received from the `next_page_token` field in the response. Send that page token to receive the subsequent page.
   x__xgafv: string, V1 error format.
     Allowed values