fix(docs): updated width on table of contents (#4202)

It looks like some of the widths changed since v5. This caused flex to stop wrapping the table of contents at the viewports mentioned in #4178. The table of contents was still present, but just at the bottom of the screen since the order was 1 (the main content is ordered at 0). Dropping down to this width seems to allow wrapping as expected again.

Should fix #4178

packages/documentation-framework/components/tableOfContents/tableOfContents.css

@@ -48,7 +48,7 @@
 
 @media (min-width: 1451px) {
   .ws-toc {
-    width: 280px;
+    width: 260px;
     max-height: calc(100vh - 76px);
     overflow-y: auto;
     /* Hide TOC scrollbar IE, Edge & Firefox */