Bump @fortawesome/free-solid-svg-icons from 5.6.0 to 5.6.3 in /frontend

Bumps [@fortawesome/free-solid-svg-icons](https://github.com/FortAwesome/Font-Awesome) from 5.6.0 to 5.6.3.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@5.6.0...5.6.3)

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

frontend/package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "^1.2.8",
     "@fortawesome/free-brands-svg-icons": "^5.5.0",
-    "@fortawesome/free-solid-svg-icons": "^5.5.0",
+    "@fortawesome/free-solid-svg-icons": "^5.6.3",
     "@fortawesome/react-fontawesome": "^0.1.3",
     "availity-reactstrap-validation": "^2.3.3",
     "awesome-phonenumber": "^2.3.1",