feat: Automated regeneration of cloudbilling v1 client

generated/google/apis/cloudbilling_v1.rb

@@ -26,7 +26,7 @@ module Google
     # @see https://cloud.google.com/billing/
     module CloudbillingV1
       VERSION = 'V1'
-      REVISION = '20200912'
+      REVISION = '20201017'
 
       # View and manage your Google Cloud Platform billing accounts
       AUTH_CLOUD_BILLING = 'https://www.googleapis.com/auth/cloud-billing'

generated/google/apis/cloudbilling_v1/classes.rb

@@ -477,7 +477,7 @@ module Google
       class Money
         include Google::Apis::Core::Hashable
       
-        # The 3-letter currency code defined in ISO 4217.
+        # The three-letter currency code defined in ISO 4217.
         # Corresponds to the JSON property `currencyCode`
         # @return [String]
         attr_accessor :currency_code

generated/google/apis/cloudbilling_v1/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "c98c719bbab68d0890524d53f8b629d7858af9c2"
+        "sha": "9dbe47b50cf9821abd0b99045aefd29e469d2ca4"
       }
     }
   ]