build(deps): bump metalsmith from 2.4.2 to 2.4.3 (#4613)

Bumps [metalsmith](https://github.com/metalsmith/metalsmith) from 2.4.2 to 2.4.3.
- [Release notes](https://github.com/metalsmith/metalsmith/releases)
- [Changelog](https://github.com/metalsmith/metalsmith/blob/master/CHANGELOG.md)
- [Commits](metalsmith/metalsmith@v2.4.2...v2.4.3)

---
updated-dependencies:
- dependency-name: metalsmith
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "junk": "^3.1.0",
     "lodash.defaultsdeep": "^4.6.1",
     "marked": "^4.0.16",
-    "metalsmith": "^2.4.2",
+    "metalsmith": "^2.4.3",
     "metalsmith-collections": "^0.9.0",
     "metalsmith-feed": "^1.0.0",
     "metalsmith-layouts": "^2.3.1",