Fix template includes in admin/changelog.php

This error was introduced when we rearranged the admin directories in
50e7fb6. The reference to `changelog_view.php` should not have
been modified to include `admin/`, because it is not an admin page.

The previous ambiguity was the result of having template location
fallbacks in `Template::getTemplateLocation`.

src/templates/Default/engine/Default/admin/changelog.php

@@ -4,7 +4,7 @@
 	return;
 }
 
-$this->includeTemplate('admin/changelog_view.php', ['Versions' => [$FirstVersion]]); ?>
+$this->includeTemplate('changelog_view.php', ['Versions' => [$FirstVersion]]); ?>
 
 <ul>
 	<li>
@@ -37,4 +37,4 @@
 </ul>
 
 <?php
-$this->includeTemplate('admin/changelog_view.php'); ?>
+$this->includeTemplate('changelog_view.php'); ?>