[DOC] Typo in change log [ci skip]

Although a mint flavored test suite sounds delicious,
I believe it's supposed to be minitest!


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46203 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -382,7 +382,7 @@ Sat May 24 13:42:46 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 Sat May 24 09:39:06 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
-	* defs/default_gems: removed mintiest entry.
+	* defs/default_gems: removed minitest entry.
 
 Sat May 24 06:17:33 2014  Ryan Davis  <ryand-ruby@zenspider.com>