Update CHANGELOG.md for #711
Update CHANGELOG.md for #711

yuya-oc/electron-mattermost,yuya-oc/electron-mattermost,mattermost/desktop,mattermost/desktop,yuya-oc/electron-mattermost,mattermost/desktop,yuya-oc/desktop,yuya-oc/desktop,mattermost/desktop,mattermost/desktop,yuya-oc/desktop