Bug 1560426 - Fix dead link in getting started page. r=sole.

Differential Revision: https://phabricator.services.mozilla.com/D35486

--HG--
extra : moz-landing-system : lando

devtools/docs/getting-started/README.md

@@ -1,5 +1,5 @@
 # Getting started
 
-This section describes [how to create a Bugzilla account](bugzilla.md), [how to build Firefox code locally](build.md), and how to [set up a development profile](development-profile.md), all of which are needed in order to contribute **code** to DevTools.
+This section describes [how to create a Bugzilla account](bugzilla.md), [how to build Firefox code locally](build.md), and how to [set up a development profile](development-profiles.md), all of which are needed in order to contribute **code** to DevTools.
 
 If you want to help, but not necessarily writing code (UX, bugs...), the [contributing](../contributing.html) page can give you helpful pointers.