fix(deps): update font awesome to v6

Author: renovate[bot]

package-lock.json

@@ -33,10 +33,10 @@
     "@edx/frontend-component-header": "4.5.2",
     "@edx/frontend-platform": "4.6.1",
     "@edx/paragon": "^20.44.0",
-    "@fortawesome/fontawesome-svg-core": "1.2.36",
-    "@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/fontawesome-svg-core": "6.4.2",
+    "@fortawesome/free-brands-svg-icons": "6.4.2",
+    "@fortawesome/free-regular-svg-icons": "6.4.2",
+    "@fortawesome/free-solid-svg-icons": "6.4.2",
     "@fortawesome/react-fontawesome": "0.2.0",
     "@pact-foundation/pact": "^11.0.2",
     "classnames": "2.3.2",