Use new bg-lines

Author: mtrythall

src/about/public-health.html

@@ -99,7 +99,7 @@ <h2 id="check-in-procedure">Check-in Procedure</h3>
 </div>
 {% endcomment %}
 
-<div class="bg-no-repeat block-container" style="background-image: url(/assets/img/theme/hero-bg.svg)">
+<div class="bg-no-repeat block-container bg-lines">
   <div class="flex flex-col items-center justify-center gap-4 wrapper">
     <h2 class="subheading">Questions about our Public Health Policy?</h2>
     <a href="mailto:{{site.contact_us_email}}" class="button">Email the organizers</a>