Update using.txt to include freedoom bad*ss edition

using.html

@@ -134,6 +134,11 @@ <h2 id="_mods">Mods</h2>
 <a href="https://codeberg.org/mc776/hideousdestructor">Hideous Destructor</a> - a GZDoom mod for both <em>Doom</em> and <em>Freedoom</em> that leans into the speculative fiction aspects of the monsters and weapons, with the side effect of turning the gameplay into a tactical simulation-style shooter with some parkour elements.
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+<a href="https://freedoom-badass-edition.github.io">freedoom bad*ss edition</a> - a UZDoom jokewad made specifically for <em>Freedoom</em> that contains new maps, weapons, monsters, player classes and bad*ssery with an asterisk in the purest form.
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using.txt

@@ -28,3 +28,4 @@ https://github.com/freedoom/freedoom.github.io[website project at GitHub].
 
  * https://zdoom.org/wiki/Barista[Barista] - a ZDoom mod ``inspired by the _Doom_ Bible, _Marathon_ and _Half-Life_. It uses resources derived from _Freedoom_ and various other sources, enough to replace everything needed by the single map and therefore work as a stand-alone.''
  * https://codeberg.org/mc776/hideousdestructor[Hideous Destructor] - a GZDoom mod for both _Doom_ and _Freedoom_ that leans into the speculative fiction aspects of the monsters and weapons, with the side effect of turning the gameplay into a tactical simulation-style shooter with some parkour elements.
+ * https://freedoom-badass-edition.github.io[freedoom bad*ss edition] - a UZDoom jokewad made specifically for _Freedoom_ that contains new maps, weapons, monsters, player classes and bad*ssery with an asterisk in the purest form.