fix(deps): update font awesome to v6

Author: renovate-bot

package-lock.json

@@ -38,9 +38,9 @@
     "@edx/frontend-platform": "1.15.2",
     "@edx/paragon": "19.7.0",
     "@fortawesome/fontawesome-svg-core": "1.3.0",
-    "@fortawesome/free-brands-svg-icons": "5.15.4",
-    "@fortawesome/free-regular-svg-icons": "5.15.4",
-    "@fortawesome/free-solid-svg-icons": "5.15.4",
+    "@fortawesome/free-brands-svg-icons": "6.0.0",
+    "@fortawesome/free-regular-svg-icons": "6.0.0",
+    "@fortawesome/free-solid-svg-icons": "6.0.0",
     "@fortawesome/react-fontawesome": "0.1.17",
     "@popperjs/core": "2.11.4",
     "@reduxjs/toolkit": "1.6.2",