Fix alt text for the apprise icon.

templates/front/channels.html

@@ -216,7 +216,7 @@
         {% if enable_apprise %}
         <li>
             <img src="{% static 'img/integrations/apprise.png' %}"
-                 class="icon" alt="Pushover icon" />
+                 class="icon" alt="Apprise icon" />
 
             <h2>Apprise</h2>
             <p>Receive instant push notifications using Apprise; see <a href="https://github.com/caronc/apprise#popular-notification-services" >all of the supported services here</a>.</p>