build(deps): bump metalsmith from 2.5.0 to 2.5.1 (#4873)

Bumps [metalsmith](https://github.com/metalsmith/metalsmith) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/metalsmith/metalsmith/releases)
- [Changelog](https://github.com/metalsmith/metalsmith/blob/master/CHANGELOG.md)
- [Commits](metalsmith/metalsmith@v2.5.0...v2.5.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

package-lock.json

@@ -42,7 +42,7 @@
     "junk": "^3.1.0",
     "lodash.defaultsdeep": "^4.6.1",
     "marked": "^4.1.1",
-    "metalsmith": "^2.5.0",
+    "metalsmith": "^2.5.1",
     "metalsmith-collections": "^0.9.0",
     "metalsmith-feed": "^1.0.0",
     "metalsmith-layouts": "^2.3.1",