Merge pull request #2274 from canonical/copy-update-lxd-install

chore: change spelling from UK to US

Author: goulinkh

templates/lxd/install.html

@@ -183,7 +183,7 @@ <h2>Firewall issues</h2>
   <section class="p-section">
     <div class="p-section--shallow u-fixed-width">
       <hr class="p-rule" />
-      <h2>Familiarise yourself with&nbsp;the&nbsp;basics</h2>
+      <h2>Familiarize yourself with&nbsp;the&nbsp;basics</h2>
     </div>
     <div class="row--25-75">
       <div class="col">