Update README.md

Author: Dmitri Zimin(e)

README.md

@@ -116,10 +116,10 @@ sphinx-autobuild -H 127.0.0.1 -b html ./docs/source/ ./docs/build/html
         st2 trigger list
 
 * Reference the document
-
-    :doc:`/start`
-    :doc:`in the Rules doc </rules>`
-
+```
+       :doc:`/start`
+       :doc:`in the Rules doc </rules>`
+```
 * Referencing an arbitrary section: for instance, there's examples section in sensors.rst. Define a reference on `examples` section in sensors.rst:
 
          .. _sensors-examples: