Fix one config error for flaky-test-reporter
@@ -49,7 +49,7 @@ jobConfigs:
slackChannels:
- name: s390x
identity: C027YB4QUUU
- - name: kourier-stable_serving_main
+ - name: kourier-stable_serving_main_periodic
org: knative
repo: serving
type: postsubmit
