Use the same gear icon as in debug area.

src/vs/workbench/parts/update/electron-browser/media/update.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><defs><style>.icon-canvas-transparent,.icon-vs-out{fill:#f6f6f6;}.icon-canvas-transparent{opacity:0;}.icon-vs-bg{fill:#424242;}</style></defs><title>configure</title><g id="canvas"><path class="icon-canvas-transparent" d="M16,0V16H0V0Z"/></g><g id="outline" style="display: none;"><path class="icon-vs-out" d="M16,10.015l-2.238.372,1.318,1.847L12.233,15.08l-1.847-1.318L10.013,16H5.986l-.373-2.237L3.767,15.08.919,12.233l1.319-1.847L0,10.013V5.986l2.238-.373L.919,3.767,3.768.919,5.613,2.238,5.986,0h4.028l.372,2.238L12.233.919,15.08,3.768,13.762,5.613,16,5.986Z"/></g><g id="iconBg"><path class="icon-vs-bg" d="M12.876,9.521,15,9.167V6.834L12.879,6.48a5.12,5.12,0,0,0-.354-.854l1.25-1.75-1.65-1.65L10.373,3.477c-.137-.072-.262-.159-.408-.219s-.3-.087-.444-.133L9.167,1H6.834L6.48,3.121a5.118,5.118,0,0,0-.854.354l-1.75-1.25-1.65,1.65L3.477,5.627c-.072.137-.159.262-.219.408s-.087.3-.133.444L1,6.833V9.166l2.121.354a5.122,5.122,0,0,0,.354.854l-1.25,1.75,1.65,1.65,1.752-1.252c.137.072.262.159.408.22s.3.087.444.133L6.833,15H9.166l.354-2.121a5.121,5.121,0,0,0,.854-.354l1.75,1.25,1.65-1.65-1.252-1.752c.072-.137.159-.263.219-.409S12.83,9.669,12.876,9.521ZM8,10.212A2.212,2.212,0,1,1,10.212,8,2.212,2.212,0,0,1,8,10.212Z"/></g></svg>
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