Typo

index.html

@@ -22,7 +22,7 @@
     <p>Resizing images on the fly. Source:&nbsp;<a href="https://github.com/tsoding/olive.c/blob/master/demos/squish.c">demos/squish.c</a></p>
     <canvas id="app-squish"></canvas>
 
-    <h2 id="demo-triangle3d"><a href="#demo-triangle3d">Triangle 3D</h2>
+    <h2 id="demo-triangle3d"><a href="#demo-triangle3d">Triangle 3D</a></h2>
     Rotating rainbow triangle in 3D. Unlike <a href="#demo-3d">3D dots above</a> this is a solid shape. Source:&nbsp;<a href="https://github.com/tsoding/olive.c/blob/master/demos/triangle3d.c">demos/triangle3d.c</a></p>
     <canvas id="app-triangle3d"></canvas>