Fix X (formerly Twitter) label and logo in personal pages

Author: marcopernpruner

_includes/head.html

@@ -8,11 +8,11 @@
     <title>{{ page.title }} - {{ site.title }}</title>
   {%- endif %}
   <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/app.css">
-  <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/custom.css?v=5">
+  <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/custom.css?v=6">
   <link rel="shortcut icon" type="image/png"
     {% if site.favicon %} href="{{ site.favicon | prepend: site.baseurl }}" {% else %} href="{{ site.baseurl }}/favicon.png" {% endif %} />
   <script src="https://cdn.jsdelivr.net/gh/alpinejs/[email protected]/dist/alpine.min.js" defer></script>
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5/css/all.min.css">
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.4.2/css/all.min.css">
   <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/jpswalsh/academicons@1/css/academicons.min.css">
   <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
   {% seo %}

_layouts/person.html

@@ -224,7 +224,7 @@ <h4>{{ year.name }}</h4>
                                     {% assign linkName = "ResearchGate" %}
                                     {% assign linkURL = "https://www.researchgate.net/profile/" | append: link.value %}
                                 {% when "Twitter" %}
-                                    {% assign linkName = "Twitter" %}
+                                    {% assign linkName = "X" %}
                                     {% assign linkURL = "https://twitter.com/" | append: link.value %}
                                 {% when "Website" %}
                                     {% assign linkName = "Website" %}

assets/css/custom.css

@@ -751,7 +751,7 @@ section.page-top {
 /* Twitter */
 .single-fbkperson .additional-info-wrapper ul.people-links-list li.contains-Twitter:before {
   font-family: "Font Awesome 5 Brands";
-  content: "\f099";
+  content: "\e61b";
 }
 
 /* URL */