Please add something like

<script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"View related Page","action":{"@type":"ViewAction","url":"https://confluence.atlassian.com/x/WgYhIw","name":"View Page"}}</script>

as documented in https://developers.google.com/gmail/actions/

to allow Inbox actions on Mail Server / Client like Gmail that supports that Schema.org extension

TBD: Which types of Notification causes which link / label, e.g For Comments, the link should point to the comment and should be labeled "View Comment".
Perhaps it might make sense to point to the pageversions if there are changes?!