Use Micromark in lint-changelog script (#19603)

scripts/lint-changelog.js

@@ -3,9 +3,8 @@
 import assert from "node:assert/strict";
 import fs from "node:fs";
 import indexToPosition from "index-to-position";
+import { fromMarkdown } from "mdast-util-from-markdown";
 import { outdent } from "outdent";
-import remarkParse from "remark-parse";
-import unified from "unified";
 import { CHANGELOG_CATEGORIES } from "./utilities/changelog.js";
 
 const CHANGELOG_DIR = "changelog_unreleased";
@@ -162,8 +161,7 @@ function getCommentDescription(content, comment) {
 // Forbid HTML in title
 // https://github.com/prettier/prettier/issues/17089
 function validateTitle(displayPath, title) {
-  const processor = unified().use(remarkParse);
-  const tree = processor.runSync(processor.parse(title));
+  const tree = fromMarkdown(title);
   assert.equal(tree.children.length, 1);
   assert.equal(tree.children[0].type, "paragraph");
   const { children } = tree.children[0];