godot/editor/icons/GuiSpinboxUp.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="8"><path fill="none" stroke="#e0e0e0" stroke-linecap="round" stroke-linejoin="round" stroke-opacity=".8" stroke-width="2" d="m4 6 4-4 4 4"/></svg>