Bump markdown-it from 13.0.1 to 14.1.1 in /demos/browser (#3166)

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) from 13.0.1 to 14.1.1.
- [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md)
- [Commits](markdown-it/markdown-it@13.0.1...14.1.1)

---
updated-dependencies:
- dependency-name: markdown-it
  dependency-version: 14.1.1
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

demos/browser/package-lock.json

@@ -30,7 +30,7 @@
     "compression": "^1.8.1",
     "jquery": "^3.5.1",
     "lodash": "^4.17.20",
-    "markdown-it": "^13.0.1",
+    "markdown-it": "^14.1.1",
     "popper.js": "^1.15.0",
     "util": "^0.12.4"
   },