build(deps-dev): bump remark-frontmatter from 4.0.1 to 5.0.0 (#1887)

Bumps [remark-frontmatter](https://github.com/remarkjs/remark-frontmatter) from 4.0.1 to 5.0.0.
- [Release notes](https://github.com/remarkjs/remark-frontmatter/releases)
- [Commits](remarkjs/remark-frontmatter@4.0.1...5.0.0)

---
updated-dependencies:
- dependency-name: remark-frontmatter
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -126,7 +126,7 @@
     "remark-autolink-headings": "7.0.1",
     "remark-emoji": "^4.0.1",
     "remark-extract-anchors": "1.1.1",
-    "remark-frontmatter": "^4.0.1",
+    "remark-frontmatter": "^5.0.0",
     "remark-gfm": "^1.0.0",
     "remark-html": "^15.0.1",
     "remark-refractor": "montogeek/remark-refractor",