build: Bump @fortawesome/fontawesome-free from 6.4.0 to 6.4.2 (#3191)

Bumps [@fortawesome/fontawesome-free](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/fontawesome-free"
  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>

package.json

@@ -17,7 +17,7 @@
     "heroku-postbuild": "yarn run prod && yarn run build-waiting-lists-manager-prod"
   },
   "dependencies": {
-    "@fortawesome/fontawesome-free": "^6.4.0",
+    "@fortawesome/fontawesome-free": "^6.4.2",
     "admin-lte": "2.4.18",
     "axios": "^1.4",
     "bootstrap": "^3.3.7",

yarn.lock

@@ -890,10 +890,10 @@
   resolved "https://registry.yarnpkg.com/@discoveryjs/json-ext/-/json-ext-0.5.5.tgz#9283c9ce5b289a3c4f61c12757469e59377f81f3"
   integrity sha512-6nFkfkmSeV/rqSaS4oWHgmpnYw194f6hmWF5is6b0J1naJZoiD0NTc9AiUwPHvWsowkjuHErCZT1wa0jg+BLIA==
 
-"@fortawesome/fontawesome-free@^6.4.0":
-  version "6.4.0"
-  resolved "https://registry.yarnpkg.com/@fortawesome/fontawesome-free/-/fontawesome-free-6.4.0.tgz#1ee0c174e472c84b23cb46c995154dc383e3b4fe"
-  integrity sha512-0NyytTlPJwB/BF5LtRV8rrABDbe3TdTXqNB3PdZ+UUUZAEIrdOJdmABqKjt4AXwIoJNaRVVZEXxpNrqvE1GAYQ==
+"@fortawesome/fontawesome-free@^6.4.2":
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/@fortawesome/fontawesome-free/-/fontawesome-free-6.4.2.tgz#36b6a9cb5ffbecdf89815c94d0c0ffa489ac5ecb"
+  integrity sha512-m5cPn3e2+FDCOgi1mz0RexTUvvQibBebOUlUlW0+YrMjDTPkiJ6VTKukA1GRsvRw+12KyJndNjj0O4AgTxm2Pg==
 
 "@nodelib/[email protected]":
   version "2.1.5"