Fix an invalid closing div html element

src/Packagist/WebBundle/Resources/views/Package/versionDetails.html.twig

@@ -8,7 +8,7 @@
     </span>
 
     <span class="release-date">{{ version.releasedAt|date("Y-m-d H:i") }} UTC</span>
-</div class="version-number">
+</div>
 
 <div class="clearfix package-links">
     {% for types in [["require", "devRequire", "suggest", "provide", "conflict", "replace"]] %}