Bump markdown-it-anchor from 8.6.7 to 9.2.0

Bumps [markdown-it-anchor](https://github.com/valeriangalliat/markdown-it-anchor) from 8.6.7 to 9.2.0.
- [Release notes](https://github.com/valeriangalliat/markdown-it-anchor/releases)
- [Changelog](https://github.com/valeriangalliat/markdown-it-anchor/blob/master/CHANGELOG.md)
- [Commits](valeriangalliat/markdown-it-anchor@v8.6.7...v9.2.0)

---
updated-dependencies:
- dependency-name: markdown-it-anchor
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -10,7 +10,7 @@
     "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.0",
     "del-cli": "^3.0.1",
     "markdown-it": "^14.1.0",
-    "markdown-it-anchor": "^8.6.7",
+    "markdown-it-anchor": "^9.2.0",
     "markdown-it-toc-done-right": "^4.2.0",
     "npm-run-all": "^4.1.5",
     "sass": "^1.79.4"