docs: add link to google/apiclient-services release page (#1830)
docs: add link to google/apiclient-services release page (#1830)


michabbb-backup/google-api-php-client,eRadical/google-api-php-client,bshaffer/google-api-php-client,michabbb-backup/google-api-php-client,googleapis/google-api-php-client