[TF-M] TF-M openCI nightly notification mail list is ready to subscribe

Hi,

There is a CI notification mail list enabled, it aims to send the failure info of TF-M nightly job to the subscribers without spam to a big group. If you are interested in the master branch nightly verification status, feel free to add your email to the list.

Subscribing: https://lists.trustedfirmware.org/mailman/listinfo/tf-m-ci-notifications

The notification only triggers a notification when CI build or test fail occur from the nightly job.

Thanks Karl