Fix typo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76186 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/SystemLibrary.html b/docs/SystemLibrary.html
index 8334a41..29153cb 100644
--- a/docs/SystemLibrary.html
+++ b/docs/SystemLibrary.html
@@ -76,7 +76,7 @@
 </div>
 
 <!-- ======================================================================= -->
-<div class="doc_subsection"><a name="headers">Don't Inlcude System Headers</a>
+<div class="doc_subsection"><a name="headers">Don't Include System Headers</a>
 </div>
 <div class="doc_text">
   <p>Except in <tt>lib/System</tt>, no LLVM source code should directly