home.html: fix typo

Author: sullyj3

_layouts/home.html

@@ -51,7 +51,7 @@ <h3>Flexible</h3>
           <p>hyper enables as many usecases as possible. It has no opinion on application structure, and makes few assumptions about its environment. This includes being portable to different operating systems.</p>
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         <div class="col-md-6 col-lg-4">
-          <h3>Understable</h3>
+          <h3>Understandable</h3>
           <p>hyper is no more complicated than it has to be. HTTP is not simple. It may not be as “easy” as 1-line to do everything, but it shouldn’t be “hard” to find the answers.</p>
         </div>
       </div>