fix(docs-infra) code example in 'usage notes' tab is shrunk

Fixes CSS bug that docs detail tabs are shrunk and not have full available width

Fixes angular#52818

adev/src/app/features/references/api-reference-details-page/api-reference-details-page.component.scss

@@ -52,6 +52,7 @@
         width: 60%;
       }
       &:not(.adev-reference-api-tab) {
+        width: 100%;
         max-width: var(--page-width);
       }
     }