Add onlyIfAnnotated to focus example

Author: pomber

.changeset/lovely-houses-rule.md

@@ -2,4 +2,4 @@
 "codehike": patch
 ---
 
-Fix `jsxDEV` warning
+Better use of `jsxDEV` when children aren't static, fix #433 in #435

.changeset/violet-insects-melt.md

@@ -2,4 +2,4 @@
 "codehike": patch
 ---
 
-Compatibility with ts `moduleResolution: node`, fix #437
+Compatibility with ts `moduleResolution: node`, fix #437 in #441

apps/web/content/docs/code/focus.mdx

@@ -33,6 +33,7 @@ import React, { useLayoutEffect, useRef } from "react"
 
 export const focus: AnnotationHandler = {
   name: "focus",
+  onlyIfAnnotated: true,
   PreWithRef: (props) => {
     const ref = getPreRef(props)
     useScrollToFocus(ref)