Update asf-volunteers.md

Added cdutz to the list
diff --git a/source/contributors/asf-volunteers.md b/source/contributors/asf-volunteers.md
index 707f09a..54646a8 100644
--- a/source/contributors/asf-volunteers.md
+++ b/source/contributors/asf-volunteers.md
@@ -29,5 +29,6 @@
 -->
 
 * bdelacretaz # mentor, speaker
+* cdutz # mentor, speaker
 * curcuru # mentor, speaker
 * rbowen # mentor, speaker