Bump @fortawesome/free-brands-svg-icons from 6.4.0 to 6.4.2 (#978)

Bumps [@fortawesome/free-brands-svg-icons](https://github.com/FortAwesome/Font-Awesome) from 6.4.0 to 6.4.2.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/6.x/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@6.4.0...6.4.2)

---
updated-dependencies:
- dependency-name: "@fortawesome/free-brands-svg-icons"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -9,7 +9,7 @@
   },
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "6.4.2",
-    "@fortawesome/free-brands-svg-icons": "6.4.0",
+    "@fortawesome/free-brands-svg-icons": "6.4.2",
     "@fortawesome/free-solid-svg-icons": "6.4.0",
     "@fortawesome/react-fontawesome": "0.2.0",
     "@mdx-js/mdx": "1.6.22",