Fix link to mentoring guide

git-svn-id: https://svn.apache.org/repos/asf/comdev/site/trunk@1830846 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/content/guide-to-being-a-mentor.mdtext b/content/guide-to-being-a-mentor.mdtext
index 73ba3b9..24f06e3 100644
--- a/content/guide-to-being-a-mentor.mdtext
+++ b/content/guide-to-being-a-mentor.mdtext
@@ -35,7 +35,7 @@
 For more information about what it means to be a mentor and on how to write
 a proposal see:
 
-  - [GSoC Mentoring Guide](http://flossmanuals.net/GSoCMentoring/)
+  - [GSoC Mentoring Guide](https://developers.google.com/open-source/gsoc/resources/guide#mentor_guide)
   - [GSoC Advice For Mentors](http://code.google.com/p/google-summer-of-code/wiki/AdviceforMentors)
   - [Gnome HowTo on mentoring](http://www.gnome.org/~federico/docs/summer-of-code-mentoring-howto/)
   - [How to be a lazy but successful Google SoC mentor](http://ploum.net/post/221-how-to-be-a-lazy-but-successful-googlesoc-mentor)