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

Bumps [@fortawesome/fontawesome-free](https://github.com/FortAwesome/Font-Awesome) from 5.14.0 to 5.15.0.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@5.14.0...5.15.0)

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

Rnwood.Smtp4dev/ClientApp/package.json

@@ -36,7 +36,7 @@
     "vue-router": "^3.4.5",
     "vue-template-compiler": "^2.6.12",
     "vue2-ace-editor": "0.0.15",
-    "@fortawesome/fontawesome-free": "^5.14.0",
+    "@fortawesome/fontawesome-free": "^5.15.0",
     "core-js": "^3.6.5",
     "node-sass": "^4.14.1",
     "sass": "^1.26.11",