[Secure-testing-team] Updates for testing-security track page

[Florian Weimer]

* Djoume SALVETTI:

> But we also need to manually add some 
>
>   [sarge] - mozilla-firefox <not-affected>
>
> to track sarge status (when we have some info) don't we?

Yes, and you should add an explanation like "only 1.5 is affected" in
parentheses.