docs: Update Freenode to OFTC

http://lists.openstack.org/pipermail/openstack-discuss/2021-May/022780.html

Change-Id: Ib10ac6a60550581878fb73e9fdb1c77c1fb713b6

README.rst

@@ -12,11 +12,11 @@ on Kubernetes.
 Communication
 -------------
 
-* Join us on `IRC <irc://chat.freenode.net:6697/openstack-helm>`_:
-  #openstack-helm on freenode
+* Join us on `IRC <irc://chat.oftc.net/openstack-helm>`_:
+  #openstack-helm on oftc
 * Community `IRC Meetings
   <http://eavesdrop.openstack.org/#OpenStack-Helm_Team_Meeting>`_:
-  [Every Tuesday @ 3PM UTC], #openstack-meeting-alt on freenode
+  [Every Tuesday @ 3PM UTC], #openstack-meeting-alt on oftc
 * Meeting Agenda Items: `Agenda
   <https://etherpad.openstack.org/p/openstack-helm-meeting-agenda>`_
 * Join us on `Slack <https://kubernetes.slack.com/messages/C3WERB7DE/>`_

doc/source/contributor/contributing.rst

@@ -20,11 +20,11 @@ Communication
 .. This would be a good place to put the channel you chat in as a project; when/
    where your meeting is, the tags you prepend to your ML threads, etc.
 
-* Join us on `IRC <irc://chat.freenode.net:6697/openstack-helm>`_:
-  #openstack-helm on freenode
+* Join us on `IRC <irc://chat.oftc.net/openstack-helm>`_:
+  #openstack-helm on oftc
 * Community `IRC Meetings
   <http://eavesdrop.openstack.org/#OpenStack-Helm_Team_Meeting>`_:
-  [Every Tuesday @ 3PM UTC], #openstack-meeting-alt on freenode
+  [Every Tuesday @ 3PM UTC], #openstack-meeting-alt on oftc
 * Meeting Agenda Items: `Agenda
   <https://etherpad.openstack.org/p/openstack-helm-meeting-agenda>`_
 * Join us on `Slack <https://kubernetes.slack.com/messages/C3WERB7DE/>`_

doc/source/troubleshooting/index.rst

@@ -19,8 +19,8 @@ Getting help
 Channels
 --------
 
-* Join us on `IRC <irc://chat.freenode.net:6697/openstack-helm>`_:
-  #openstack-helm on freenode
+* Join us on `IRC <irc://chat.oftc.net/openstack-helm>`_:
+  #openstack-helm on oftc
 * Join us on `Slack <http://slack.k8s.io/>`_ - #openstack-helm
 
 Bugs and Feature requests