CONTRIBUTING: create a new further reading section

As we don't want to clutter up the gist with a lot of information.
Move the link to the informative blog post to the new further
reading section.

CONTRIBUTING.md

@@ -14,8 +14,6 @@ changed. It is also good to prefix the first line with "area: " where the "area"
 is a filename or identifier for the general area of the code being modified.
 The body should provide a meaningful commit message.
 
-    Read the importance of good commit messages in the [linked blog post](https://blog.oozou.com/commit-messages-matter-60309983c227?gi=c550a10d0f67).
-
 1. Write Javadocs
 
     We require contributors to include Javadocs for all new methods and classes
@@ -34,3 +32,7 @@ The body should provide a meaningful commit message.
 1. Write tests for your code (if possible)
 
 1. Make sure the Wiki pages don't become stale by updating them (if needed)
+
+### Further reading
+
+* [Importance of good commit messages](https://blog.oozou.com/commit-messages-matter-60309983c227?gi=c550a10d0f67)