rename README.ententions to README-extentions.rst
diff --git a/README.rst b/README.rst
index 6a70e2f..fc5757c 100644
--- a/README.rst
+++ b/README.rst
@@ -28,4 +28,4 @@
 =============
 
 Documentation covering the original version is in the doc directory.
-See the README.extensions file for documentation on the extentions.
+See the README-extensions.rst file for documentation on the extentions.