Add hyperlink to notification text

Hi, I have tried a few different ways to do this but it doesn't seem to work through S4S. I have custom text added to a notification action (via string table), but I can't seem to figure out how to link that text to an external website? I'm not sure if I have to add a line under it (or what that line would be) or if there's something I can do to the text itself. 



<U n="notification">

<V n="icon" t="enabled">

<V n="enabled" t="resource_key">

<U n="resource_key">

<T n="key" p="InGame\UI\Icons\Notifications\notification_briefcase.png">2f7d0004:00000000:90d20287d30025e9</T>

</U>

</V>

</V>

<V n="primary_icon_response" t="enabled">

<U n="enabled">

<E n="ui_request">SHOW_SUMMARY_PANEL</E>

</U>

</V>

<V n="secondary_icon" t="enabled">

<V n="enabled" t="participant" />

</V>

<V n="text" t="single">

<T n="single">0x04EF02F2<!--Click here test link--></T>

</V>

</U>