Update Education process in Comm Advocate page

Why is this change being made?

Modify the instructions related to the Education program so it is clear what emails are triggered when and by what system. this will help the team working these types of submission clearly identify what the various fields & alerts mean.

/mention https://gitlab.com/gitlab-com/marketing/community-relations/education-program/general/issues/31

Does this MR meet the acceptance criteria?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what