Fix grammar.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53898 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/GettingStarted.html b/docs/GettingStarted.html
index eed4547..d057390 100644
--- a/docs/GettingStarted.html
+++ b/docs/GettingStarted.html
@@ -1616,7 +1616,7 @@
 
 <div class="doc_text">
 
-<p>This document is just an <b>introduction</b> to how to use LLVM to do
+<p>This document is just an <b>introduction</b> on how to use LLVM to do
 some simple things... there are many more interesting and complicated things
 that you can do that aren't documented here (but we'll gladly accept a patch
 if you want to write something up!).  For more information about LLVM, check