chore: fix docs build in google-cloud-network-connectivity (#12356)

Towards #12326 🦕

See googleapis/gapic-generator-python#1776


This is a follow up PR as
#12348 did not
include the fix

Co-authored-by: ohmayr <omairnaveed@ymail.com>

packages/google-cloud-network-connectivity/google/cloud/networkconnectivity_v1/types/policy_based_routing.py

@@ -101,7 +101,7 @@ class PolicyBasedRoute(proto.Message):
             the lowest-numbered priority value wins. The
             default value is
             1000. The priority value must be from 1 to
-                65535, inclusive.
+            65535, inclusive.
         warnings (MutableSequence[google.cloud.networkconnectivity_v1.types.PolicyBasedRoute.Warnings]):
             Output only. If potential misconfigurations
             are detected for this route, this field will be