Bump the dev-dependencies group with 2 updates

Bumps the dev-dependencies group with 2 updates: [async](https://github.com/caolan/async) and [markdown-it-anchor](https://github.com/valeriangalliat/markdown-it-anchor).


Updates `async` from 3.2.5 to 3.2.6
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/master/CHANGELOG.md)
- [Commits](caolan/async@v3.2.5...v3.2.6)

Updates `markdown-it-anchor` from 9.0.1 to 9.1.0
- [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@v9.0.1...v9.1.0)

---
updated-dependencies:
- dependency-name: async
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: markdown-it-anchor
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

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

Author: dependabot[bot]

package-lock.json

@@ -13,13 +13,13 @@
         "@actions/github": "^6.0.0",
         "@octokit/rest": "21.0.2",
         "@quasibit/eleventy-plugin-sitemap": "^2.2.0",
-        "async": "^3.2.5",
+        "async": "^3.2.6",
         "eleventy-plugin-seo": "^0.5.2",
         "eleventy-plugin-wordcount": "^1.0.5",
         "follow-redirects": "^1.15.6",
         "html-minifier": "^4.0.0",
         "luxon": "^3.5.0",
-        "markdown-it-anchor": "^9.0.1",
+        "markdown-it-anchor": "^9.1.0",
         "markdown-it-emoji": "^3.0.0",
         "markdown-it-external-links": "^0.0.6",
         "prettier": "^3.3.3"