Bump @fortawesome/fontawesome-free from 5.15.1 to 5.15.2

Bumps [@fortawesome/fontawesome-free](https://github.com/FortAwesome/Font-Awesome) from 5.15.1 to 5.15.2.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@5.15.1...5.15.2)

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

package.json

@@ -28,7 +28,7 @@
   "devDependencies": {
     "@firebase/app": "^0.6.13",
     "@firebase/database": "^0.8.1",
-    "@fortawesome/fontawesome-free": "^5.15.1",
+    "@fortawesome/fontawesome-free": "^5.15.2",
     "@types/chart.js": "^2.9.29",
     "@types/gapi": "0.0.39",
     "@types/gapi.auth2": "0.0.52",