Correct the outdated version number of FontAwesome (#905)

Author: 1v9

_config.yml

@@ -1078,11 +1078,11 @@ vendors:
   velocity:
   velocity_ui:
 
-  # Internal version: 4.6.2
+  # Internal version: 4.7.0
   # See: https://fontawesome.com
   # Example:
   # fontawesome: //cdn.jsdelivr.net/npm/font-awesome@4/css/font-awesome.min.css
-  # fontawesome: //cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.2/css/font-awesome.min.css
+  # fontawesome: //cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css
   fontawesome:
 
   # Internal version: 2.10.4

layout/_partials/head/head.swig

@@ -63,7 +63,7 @@
 
 {% include "./external-fonts.swig" %}
 
-{% set font_awesome_uri = url_for(theme.vendors._internal + '/font-awesome/css/font-awesome.min.css?v=4.6.2') %}
+{% set font_awesome_uri = url_for(theme.vendors._internal + '/font-awesome/css/font-awesome.min.css?v=4.7.0') %}
 {% if theme.vendors.fontawesome %}
   {% set font_awesome_uri = theme.vendors.fontawesome %}
 {% endif %}