Updating breadcrumbs docs on ConditionalRender (#1871)

docs/layout-components.md

@@ -81,4 +81,13 @@ Component.ConditionalRender({
 })
 ```
 
-This example would only render the Search component when the page is not in fullpage mode.
+The example above would only render the Search component when the page is not in fullpage mode.
+
+```typescript
+Component.ConditionalRender({
+  component: Component.Breadcrumbs(),
+  condition: (page) => page.fileData.slug !== "index",
+})
+```
+
+The example above would hide breadcrumbs on the root `index.md` page.