doc: update usage for user email notification.

Signed-off-by: Larry Shen <larry.shen@nxp.com>
19 jobs for user_notification in 16 minutes and 15 seconds (queued for 7 seconds)
latest
Status Name Job ID Coverage
  Test
passed dispatcher-debian-10 #160121
amd64

00:02:34

passed dispatcher-debian-11 #160123
amd64

00:02:34

passed server-debian-10 #160122
amd64

00:02:47

passed server-debian-11 #160124
amd64

00:04:59

 
  Analyze
passed bandit-sast #160125
amd64-dind

00:00:54

passed black #160128
amd64

00:00:52

passed code_quality #160129
amd64

00:00:24

passed codespell #160134
amd64

00:00:19

passed coverage #160130
amd64

00:06:47

60.93%
passed dockerfiles #160131
amd64

00:00:17

passed eslint-sast #160126
amd64-dind

00:00:26

passed pylint #160133
amd64

00:02:37

passed schemas #160132
amd64

00:00:32

passed semgrep-sast #160127
amd64-dind

00:00:52

 
  Build
passed debian/10 #160136
amd64

00:01:34

passed debian/11 #160137
amd64

00:01:36

passed doc #160135
amd64

00:00:38

passed docker-amd64-dispatcher #160138
amd64-dind

00:03:53

passed docker-amd64-server #160139
amd64-dind

00:04:23