Fix a typo in the docs

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@162335 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/www/index.html b/www/index.html
index 6ac5ac0..3c7bc9d 100644
--- a/www/index.html
+++ b/www/index.html
@@ -186,7 +186,7 @@
     <li><code>clang++ -std=c++11 -stdlib=libc++ test.cpp</code></li>
   </ul>
 
-  <p>To run the libc++ test suit (recommended):</p>
+  <p>To run the libc++ test suite (recommended):</p>
 
   <ul>
   <li><code>cd libcxx/test</code></li>