Update version of snowflake to allow the client to perform NAT discovery

Closes issue #40016 (closed)

projects/pion-stun/config

 # vim: filetype=yaml sw=2
 version: '[% c("abbrev") %]'
 git_url: https://github.com/pion/stun
-git_hash: 51fef3542ed793994ff3da9c9b897fb23d744503 # v0.3.3
+git_hash: 4fa7a9d658b6037114fd35b6cb257979ed474a9b # v0.3.5
 filename: '[% project %]-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %].tar.gz'
 
 build: '[% c("projects/go/var/build_go_lib") %]'