Bump luxon from 2.5.0 to 3.4.3

Bumps [luxon](https://github.com/moment/luxon) from 2.5.0 to 3.4.3.
- [Changelog](https://github.com/moment/luxon/blob/master/CHANGELOG.md)
- [Commits](moment/luxon@2.5.0...3.4.3)

---
updated-dependencies:
- dependency-name: luxon
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -26,7 +26,7 @@
 		"@11ty/eleventy-plugin-syntaxhighlight": "4.2.0",
 		"eleventy-plugin-embed-twitter": "^1.4.0",
 		"isomorphic-fetch": "^3.0.0",
-		"luxon": "^2.4.0",
+		"luxon": "^3.4.3",
 		"markdown-it": "^13.0.2",
 		"markdown-it-anchor": "^8.6.7",
 		"markdown-it-attrs": "^4.1.6",