Update pointer to changelog

Modified-by: Travis Cross <tc@traviscross.com>
Signed-off-by: Travis Cross <tc@traviscross.com>

libs/libzrtp/ChangeLog

@@ -5,7 +5,7 @@
 
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 SINCE LIBZRTP v0.80 CHANGELOG IS A PART OF HTML DOCUMENTATION. 
-https://developers.zfoneproject.com/libzrtp/wiki/LibzrtpChangeLog
+Check generated html or doc/manuals/changelog.dox doxygen sources
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!