Apply suggestions from code review
Apply suggestions from code review

Co-authored-by: Julien Pivotto <df1ed88a312a603dfee9f157a90fa8f7f195ab59@gmail.com>
Signed-off-by: Tomáš Freund <146fa85345ee8d0e5bfe0184f7321a206bb70947@datamole.cz>

GoogleCloudPlatform/alertmanager,prometheus/alertmanager,prometheus/alertmanager,GoogleCloudPlatform/alertmanager,GoogleCloudPlatform/alertmanager,prometheus/alertmanager,GoogleCloudPlatform/alertmanager,prometheus/alertmanager