Font-Awesome/js-packages/@fortawesome/fontawesome-free/svgs/solid/window-maximize.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><!-- Font Awesome Free 5.15.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M464 32H48C21.5 32 0 53.5 0 80v352c0 26.5 21.5 48 48 48h416c26.5 0 48-21.5 48-48V80c0-26.5-21.5-48-48-48zm-16 160H64v-84c0-6.6 5.4-12 12-12h360c6.6 0 12 5.4 12 12v84z"/></svg>