Add an example for how to force comment-only array or object to keep multiple line in blog post (#19605)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

website/blog/2026-06-27-3.9.0.md

@@ -557,6 +557,28 @@ const array = [/* comment */];
 const object = {/* comment */};
 ```
 
+_You can use line comment or multiline comment to force the array and object to break._
+
+<!-- prettier-ignore -->
+```js
+const array = [
+  // comment
+];
+const object = {
+  // comment
+};
+const array2 = [
+  /*
+  comment
+  */
+];
+const object2 = {
+  /*
+  comment
+  */
+};
+```
+
 #### Fix dangling comment print in function parameters ([#18623](https://github.com/prettier/prettier/pull/18623) by [@fisker](https://github.com/fisker)) {#change-18623}
 
 <!-- prettier-ignore -->