Bump markdown-it from 8.4.2 to 9.0.1 in /js

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) from 8.4.2 to 9.0.1.
- [Release notes](https://github.com/markdown-it/markdown-it/releases)
- [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md)
- [Commits](https://github.com/markdown-it/markdown-it/compare/8.4.2...9.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

js/package.json

@@ -14,7 +14,7 @@
     "angular-markdown-it": "^0.6.1",
     "angular-sanitize": "^1.7.8",
     "babel-polyfill": "^6.26.0",
-    "markdown-it": "^8.4.2",
+    "markdown-it": "^9.0.1",
     "markdown-it-link-target": "^1.0.2",
     "nextcloud-axios": "^0.2.0",
     "nextcloud-vue": "^0.11.4",