[github] Update issue template (#6529)
[github] Update issue template (#6529)

Previously linked webpackbin locked in "live" mode, and also had an extraneous AppBar prop.
igorbt/material-ui,mit-cml/iot-website-source,ichiohta/material-ui,kittyjumbalaya/material-components-web,janmarsicek/material-ui,manchesergit/material-ui,hai-cea/material-ui,igorbt/material-ui,mit-cml/iot-website-source,janmarsicek/material-ui,manchesergit/material-ui,hwo411/material-ui,kittyjumbalaya/material-components-web,hai-cea/material-ui,ichiohta/material-ui,mit-cml/iot-website-source,hwo411/material-ui,janmarsicek/material-ui,janmarsicek/material-ui