Fix NEWS typo.

NEWS.md

@@ -2,7 +2,7 @@
 
 * **INCOMPATIBLE CHANGE**: `page-path` and the `blog` config class are no longer exported.
 * **INCOMPATIBLE CHANGE**: `render-content` has been renamed `render-text` for clarity.
-* New Docs: [A Hacker's Guide to Coleslaw](hacking_guide) and [Themes](theming_guide)!
+* New Docs: [A Hacker's Guide to Coleslaw][hacking_guide] and [Themes][theming_guide]!
 * A new theme *readable* based on bootswatch readable, courtesy of @rmoritz!
 * Posts may have an author to support multi-user blogs courtesy of @tychoish.
 * Fixes to the ReStructuredText plugin courtesy of @tychoish.