Update CHANGELOG.md
Update CHANGELOG.md

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