Merge pull request #50 from guillermocalvo/patch-1

Fix typo, thanks to @guillermocalvo

index.html

@@ -129,7 +129,7 @@ <h3>Windows (Cygwin)</h3>
     </div>
     <div class="col-2">
         <p>
-            For detailed git flow intallation instructions please visit the <a href="https://github.com/nvie/gitflow/wiki/Windows">git flow
+            For detailed git flow installation instructions please visit the <a href="https://github.com/nvie/gitflow/wiki/Windows">git flow
             wiki</a>.
         </p>
         <img src="img/download.png" alt="install git-flow"/>