add disclaimer

modded-swarm/index.html

@@ -42,4 +42,6 @@
       console.warn("service worker registration failed", err)
     });
   });
-} </script>  <!-- MEOW --> 
+} </script>  <!-- MEOW --> 
+
+<p class="disclaimer">&nbsp;&nbsp;This game has been modified. The original game is available at <a href="https://www.swarmsim.com">swarmsim.com</a>. Swarm Simulator is licensed under the <a href="https://www.gnu.org/licenses/gpl-3.0.en.html">GPL-3.0</a> license, so this derivative (alongside the rest of <a href="../index.html" title="To main page">orbit-loona.github.io</a>) is also licensed under GPL-3.0.</p></body>