fix #137 (#228)

Author: Rich-Harris

apps/svelte.dev/src/routes/docs/[...path]/OnThisPage.svelte

@@ -148,7 +148,7 @@
 		@media (min-width: 1200px) {
 			position: fixed;
 			top: 14rem;
-			right: 0;
+			left: calc(100dvw - var(--sidebar-width));
 			width: var(--sidebar-width);
 			padding: 0 var(--sk-page-padding-side) 0 0;
 			box-sizing: border-box;