feat(docs): update x (twitter) logo

Author: rstoenescu

docs/src/assets/links.social.js

@@ -1,4 +1,4 @@
-import { fabFacebookSquare, fabGithub, fabTwitter } from '@quasar/extras/fontawesome-v5'
+import { fabFacebook, fabGithub, fasX } from '@quasar/extras/fontawesome-v6'
 import { mdiDiscord, mdiForum } from '@quasar/extras/mdi-v6'
 
 export const socialLinks = {
@@ -8,7 +8,7 @@ export const socialLinks = {
     { name: 'Github', icon: fabGithub, path: 'https://github.quasar.dev', external: true },
     { name: 'Discord', icon: mdiDiscord, path: 'https://chat.quasar.dev', external: true },
     { name: 'Forum', icon: mdiForum, path: 'https://forum.quasar.dev', external: true },
-    { name: 'Twitter', icon: fabTwitter, path: 'https://twitter.quasar.dev', external: true },
-    { name: 'Facebook', icon: fabFacebookSquare, path: 'https://facebook.quasar.dev', external: true }
+    { name: 'Twitter', icon: fasX, path: 'https://twitter.quasar.dev', external: true },
+    { name: 'Facebook', icon: fabFacebook, path: 'https://facebook.quasar.dev', external: true }
   ]
 }