Bump @fortawesome/fontawesome-free in /Rnwood.Smtp4dev/ClientApp

Bumps [@fortawesome/fontawesome-free](https://github.com/FortAwesome/Font-Awesome) from 5.15.2 to 5.15.3.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@5.15.2...5.15.3)

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

Rnwood.Smtp4dev/ClientApp/package.json

@@ -13,7 +13,7 @@
   },
   "devDependencies": {
     "@aspnet/signalr": "^1.0.26",
-    "@fortawesome/fontawesome-free": "^5.15.2",
+    "@fortawesome/fontawesome-free": "^5.15.3",
     "@typescript-eslint/eslint-plugin": "^4.18.0",
     "@typescript-eslint/parser": "^4.18.0",
     "@vue/cli-plugin-babel": "^4.5.11",