Add formatting to personal access token in the email

What does this MR do and why?

Currently, the HTML version of the "personal access token revoked" email notification formats the token name as code:
https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/notify/access_token_revoked_email.html.haml#L4

However, the equivalent notification for "personal access token created" does not:
https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/notify/access_token_created_email.html.haml#L4

This simple edit is to add the missing code formatting.

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Open the template for personal access token email and see the formatted token: https://gdk.test:3443/rails/mailers/notify/access_token_created_email

MR acceptance checklist

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