Update TESTING.md
Update TESTING.md
yuya-oc/desktop,yuya-oc/desktop,jnugh/desktop,yuya-oc/desktop,mattermost/desktop,yuya-oc/electron-mattermost,mattermost/desktop,mattermost/desktop,yuya-oc/electron-mattermost,jnugh/desktop,jnugh/desktop,mattermost/desktop,mattermost/desktop,yuya-oc/electron-mattermost