Add PAT expiry to notifications doc

doc/user/profile/notifications.md

@@ -146,13 +146,16 @@ Users are notified of the following events:
 | New email added              | User                | Security email, always sent. |
 | Email changed                | User                | Security email, always sent. |
 | Password changed             | User                | Security email, always sent when user changes their own password |
-| Password changed by administrator | User | Security email, always sent when an administrator changes the password of another user |
+| Password changed by administrator | User           | Security email, always sent when an administrator changes the password of another user |
 | Two-factor authentication disabled | User          | Security email, always sent. |
 | New user created             | User                | Sent on user creation, except for OmniAuth (LDAP)|
 | User added to project        | User                | Sent when user is added to project |
 | Project access level changed | User                | Sent when user project access level is changed |
 | User added to group          | User                | Sent when user is added to group |
 | Group access level changed   | User                | Sent when user group access level is changed |
+| Personal Access Tokens expiring soon | User          | Security email, always sent. |
+<!-- Do not delete or lint this instance of future tense -->
+| Personal Access Tokens have expired | User         | Security email, always sent. |
 | Project moved                | Project members (1) | (1) not disabled             |
 | New release                  | Project members     | Custom notification          |