docs: fix examples

Ben Schlegel

2023-09-17 4afb099bf3ec96e5d795e871ecb19575271c0714

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$pageWidth: 750px;
$mobileBreakpoint: 600px;
$tabletBreakpoint: 1200px;
$sidePanelWidth: 380px;
$topSpacing: 6rem;
$fullPageWidth: $pageWidth + 2 * $sidePanelWidth;