Phabricator.rst: tiny fix

llvm-svn: 187164
diff --git a/llvm/docs/Phabricator.rst b/llvm/docs/Phabricator.rst
index efab10c..0c6990e 100644
--- a/llvm/docs/Phabricator.rst
+++ b/llvm/docs/Phabricator.rst
@@ -56,7 +56,7 @@
 To upload a new patch:
 
 * Click *Differential*.
-* Click *Create Revision*.
+* Click *Create Diff*.
 * Paste the text diff or upload the patch file.
   Note that TODO
 * Leave the drop down on *Create a new Revision...* and click *Continue*.