Update Email template to the List

[dhruvdhody]

Suggestion to update the email template to the list to include:
(a) A sentence and pointer to the moderation rules (perhaps both https://github.com/ietf/Moderators/ and https://github.com/ietf/Moderators/blob/main/sop.md).
(b) A sentence that clarifies that this is the second step (level 1) in the moderation procedure, and that individual posters had previously been privately notified that their posting was against the community guidelines and yet they continued to post.

[dhruvdhody]

Further suggestions ->

(3) Consider changing your "message to list" announcement
templates to make clear that there were earlier attempts at
outreach, whether or not there was any response, and over what
period that occurred. Making the distinction to/for the
community between a one-time incident that you felt was so
serious as to cause you to step in (at level one or even level
two), a "last straw" part of sequence of events, or perceived
abuses and resulting discussions about which you have tried to
reach out over an extended period is helpful. Letting the
community know if the individual never responded to those prior
outreach attempts (either with a discussion or with a change in
behavior) is important too.