provide examples for maintenance_windows in manifest examples (#3040)

manifests/configmap.yaml

@@ -102,6 +102,7 @@ data:
   logical_backup_s3_sse: "AES256"
   logical_backup_s3_retention_time: ""
   logical_backup_schedule: "30 00 * * *"
+  # maintenance_windows: "Sat:22:00-23:59,Sun:00:00-01:00"
   major_version_upgrade_mode: "manual"
   # major_version_upgrade_team_allow_list: ""
   master_dns_name_format: "{cluster}.{namespace}.{hostedzone}"

manifests/postgresql-operator-default-configuration.yaml

@@ -16,6 +16,9 @@ configuration:
   # ignore_instance_limits_annotation_key: ""
   # ignore_resources_limits_annotation_key: ""
   # kubernetes_use_configmaps: false
+  # maintenance_windows:
+  # - "Sat:22:00-23:59"
+  # - "Sun:00:00-01:00"
   max_instances: -1
   min_instances: -1
   resync_period: 30m

pkg/cluster/util_test.go

@@ -735,7 +735,7 @@ func TestIsInMaintenanceWindow(t *testing.T) {
 		{
 			name:          "global maintenance windows all day",
 			windows:       nil,
-			configWindows: []string{"00:00-23:59"},
+			configWindows: []string{"00:00-02:00", "02:00-23:59"},
 			expected:      true,
 		},
 	}