Update community supported README: legal disclaimer (#74)

README.md

@@ -1,11 +1,14 @@
+# Disclaimer
+
+**This repository is community supported and not maintained by Mattermost. Mattermost disclaims liability for integrations, including Third Party Integrations and Mattermost Integrations. Integrations may be modified or discontinued at any time.**
+
 # Mattermost Webex Cloud Plugin 
 [![Build Status](https://img.shields.io/circleci/project/github/mattermost/mattermost-plugin-webex/master)](https://circleci.com/gh/mattermost/mattermost-plugin-webex)
 [![Code Coverage](https://img.shields.io/codecov/c/github/mattermost/mattermost-plugin-webex/master)](https://codecov.io/gh/mattermost/mattermost-plugin-webex)
 [![Release](https://img.shields.io/github/v/release/mattermost/mattermost-plugin-webex)](https://github.com/mattermost/mattermost-plugin-webex/releases/latest)
 [![HW](https://img.shields.io/github/issues/mattermost/mattermost-plugin-webex/Up%20For%20Grabs?color=dark%20green&label=Help%20Wanted)](https://github.com/mattermost/mattermost-plugin-webex/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Up+For+Grabs%22+label%3A%22Help+Wanted%22)
 
-**Maintainer:** [@cpoile](https://github.com/cpoile)
-**Co-Maintainer:** [@mickmister](https://github.com/mickmister)
+**Maintainer:** [@mickmister](https://github.com/mickmister)
 
 Start and join voice calls, video calls and use screen sharing with your team members via Cisco Webex Meetings. (We do not support Cisco Webex Teams)