footer: Add margin between CCO icons

Treefmt output

layouts/partials/footer.html

@@ -1,15 +1,19 @@
 <ul>
   <li>
-    <a href="https://creativecommons.org/publicdomain/zero/1.0/">
+    <a
+      href="https://creativecommons.org/publicdomain/zero/1.0/"
+      target="_blank"
+      rel="noopener noreferrer"
+    >
       {{ partial "cc.svg" . }}
       {{ partial "zero.svg" . }}
     </a>
   </li>
   <li>
-  <a href="/about" id="title">
-    {{ partial "logo.svg" . }}
-    {{ site.Title }}
-  </a>
+    <a href="/about" id="title">
+      {{ partial "logo.svg" . }}
+      {{ site.Title }}
+    </a>
   </li>
   <li>2021–{{ now.Year }}</li>
 </ul>