Fix malformed doc link in development getting started doc

Fix malformed link. Originally it was a resource style link, but it
should be a doc style link.

Change-Id: Ia7f4b23d20d1367a8621c4da178266a1fe515afb
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
diff --git a/development/start.rst b/development/start.rst
index 71936c4..a2c1aec 100644
--- a/development/start.rst
+++ b/development/start.rst
@@ -5,7 +5,7 @@
 Setting Up Your Work Environment
 ================================
 
-Follow the instructions at `../usage/index`.
+Follow the instructions at :doc:`../usage/index`.
 
 Familiarize Yourself with KUnit's Design
 ========================================