Update IRC network to OFTC

Change-Id: I615c6a8c78cb293903f9a778ddc2230c2d5edfd2
diff --git a/doc/source/contributor/contributing.rst b/doc/source/contributor/contributing.rst
index 62953ff..139f0b7 100644
--- a/doc/source/contributor/contributing.rst
+++ b/doc/source/contributor/contributing.rst
@@ -13,7 +13,7 @@
 
 Communication
 ~~~~~~~~~~~~~
-* IRC channel ``#openstack-qa`` at FreeNode
+* IRC channel ``#openstack-qa`` at OFTC
 * Mailing list (prefix subjects with ``[qa]`` for faster responses)
   http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-discuss