Remove useless level of <ul>

wiki/src/install/inc/steps/download.inline.html

@@ -147,7 +147,7 @@
           <div class="upgrade-tails">[[<div class="btn btn-primary inline-block">Next: Install an intermediary Tails (<span class="next-counter"></span>)</div>|upgrade/tails]]</div>
           <div class="dvd">[[<div class="btn btn-primary inline-block">Next: Burning Tails on a DVD</div>|dvd]]</div>
           <div class="vm">[[<div class="btn btn-primary inline-block">Next: Virtualization</div>|doc/advanced_topics/virtualization]]</div>
-          <ul class="download-only-img">
+          <div class="download-only-img">
             <p>Upgrade your Tails USB stick and keep your persistent storage:</p>
             <ul>
               <li>[[Upgrade inside Tails|upgrade/tails]]</li>
@@ -158,7 +158,7 @@
               <li>[[Install from macOS|install/mac/usb]]</li>
               <li>[[Install from Linux|install/linux/usb]]</li>
             </ul>
-          </ul>
+          </div>
           <ul class="download-only-iso">
             <li>[[Burn on a DVD|dvd]]</li>
             <li>[[Run in a virtual machine|doc/advanced_topics/virtualization]]</li>
@@ -272,7 +272,7 @@
         <div class="upgrade-tails">[[<div class="btn btn-primary inline-block">Next: Install an intermediary Tails (<span class="next-counter"></span>)</div>|upgrade/tails]]</div>
         <div class="dvd">[[<div class="btn btn-primary inline-block">Next: Burning Tails on a DVD</div>|dvd]]</div>
         <div class="vm">[[<div class="btn btn-primary inline-block">Next: Virtualization</div>|doc/advanced_topics/virtualization]]</div>
-        <ul class="download-only-img">
+        <div class="download-only-img">
           <p>Upgrade your Tails USB stick and keep your persistent storage:</p>
           <ul>
             <li>[[Upgrade inside Tails|upgrade/tails]]</li>
@@ -283,7 +283,7 @@
             <li>[[Install from macOS|install/mac/usb]]</li>
             <li>[[Install from Linux|install/linux/usb]]</li>
           </ul>
-        </ul>
+        </div>
         <ul class="download-only-iso">
           <li>[[Burn on a DVD|dvd]]</li>
           <li>[[Run in a virtual machine|doc/advanced_topics/virtualization]]</li>

wiki/src/install/inc/stylesheets/download.css

@@ -87,10 +87,6 @@ span.step-number {
   margin-top: 5em;
 }
 
-ul ul {
-  margin-bottom: 1.5em;
-}
-
 /* FLOATING TOGGLEABLE FOR 'WHY?' CONTEXTUAL HELP */
 
 /* Hide toggleable by default so they don't appear when there is no JavaScript. */