system-uicons/src/images/icons/external.svg

<svg height="21" viewBox="0 0 21 21" width="21" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" transform="translate(3 3)"><path d="m15.5.5v5h-5" transform="matrix(1 0 0 -1 0 6)"/><path d="m12-.95v9.9" transform="matrix(.70710678 .70710678 -.70710678 .70710678 6.343146 -7.313708)"/><path d="m7.5.5h-5c-1.1045695 0-2 .8954305-2 2v10c0 1.1045695.8954305 2 2 2h11c1.1045695 0 2-.8954305 2-2v-4"/></g></svg>