fix diff highlight (#11605)

Author: Armanio

contributors.yml

@@ -23,6 +23,7 @@
 - arjunyel
 - arka1002
 - arnassavickas
+- Armanio
 - aroyan
 - ashusnapx
 - avipatel97

docs/start/overview.md

@@ -383,7 +383,7 @@ See:
 
 Instead of waiting for the data for the next page, you can [`defer`][defer] data so the UI flips over to the next screen with placeholder UI immediately while the data loads.
 
-```jsx lines=[12,22-29,32-35,42]
+```jsx lines=[12,22-29,32-35]
 <Route
   path="issue/:issueId"
   element={<Issue />}