Removed backticks from readme

Forgot to remove backticks from sphinx

docs/README.md

@@ -6,12 +6,12 @@ These are Sphinx docs, automatically built at http://docs.wagtail.io when the ma
 
 To build the documentation for browsing, from this directory run: 
 
-    ``make html`` 
+    make html 
 
 then open ``_build/html/index.html`` in a browser.
 
 To rebuild automatically while editing the documentation, from this directory run:
 
-    ``sphinx-autobuild . _build``
+    sphinx-autobuild . _build
 
 The online editor at http://rst.ninjs.org/ is a helpful tool for checking reStructuredText syntax.