Update trim whitespace icon

src/vs/workbench/browser/media/images/git/whitespace-alt1.svg

 <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M4.5 1H6H7H8H9H10V2H9V13H10V14H9H8H7H6H5V13H6V8H4.5C2.567 8 1 6.433 1 4.5C1 2.567 2.567 1 4.5 1ZM7 13H8V2H7V7V8V13ZM4.5 2H6V7H4.5C3.11929 7 2 5.88071 2 4.5C2 3.11929 3.11929 2 4.5 2Z" fill="white"/>
-<path fill-rule="evenodd" clip-rule="evenodd" d="M10 8.5L15 4V13L10 8.5ZM13.8763 10.5585V6.44148L11.5891 8.5L13.8763 10.5585Z" fill="white"/>
+<path fill-rule="evenodd" clip-rule="evenodd" d="M6.5 1H8H9H10H11H12V2H11V13H12V14H11H10H9H8H7V13H8V8H6.5C4.567 8 3 6.433 3 4.5C3 2.567 4.567 1 6.5 1ZM9 13H10V2H9V7V8V13ZM6.5 2H8V7H6.5C5.11929 7 4 5.88071 4 4.5C4 3.11929 5.11929 2 6.5 2Z" fill="white"/>
 </svg>