Extract a variable for my Mastodon name and URL

app/config/sculpin_site.yml

@@ -24,6 +24,10 @@ ctas:
   pair: |
     Need help or want another pair of eyes on your code? Book a <a href="%site.url%/call">1-on-1 consulting call</a> or an <a href="%site.url%/pair">online pair programming session</a> with a 100% money-back guarantee.,
 
+mastodon:
+  username: opdavies
+  url: https://mastodon.social/@%mastodon.username%
+
 menu_links:
   - title: About
     url: /

source/_layouts/page.html.twig

@@ -4,7 +4,7 @@
   {{ parent() }}
 
   {% if page.url == "//" or page.url == "/daily/" %}
-    <a class="hidden" rel="me" href="https://mastodon.social/@opdavies">Mastodon</a>
+    <a class="hidden" rel="me" href="{{ site.mastodon.url }}">Mastodon</a>
   {% endif %}
 {% endblock %}