Minor update for CHANGELOG.md
Minor update for CHANGELOG.md

yuya-oc/electron-mattermost,St-Ex/desktop,yuya-oc/electron-mattermost,mattermost/desktop,yuya-oc/electron-mattermost,yuya-oc/desktop,jnugh/desktop,mattermost/desktop,mattermost/desktop,jnugh/desktop,mattermost/desktop,mattermost/desktop,yuya-oc/desktop,jnugh/desktop,St-Ex/desktop,yuya-oc/desktop,St-Ex/desktop