Fix second active version in dropdown menu

"2.1" == "2.10"

Author: SenseException

templates/layouts/documentation.html.twig

@@ -147,7 +147,7 @@
                                                     {% set versionUrl = get_url_version(version, page.url, page.docsVersion) %}
 
                                                     <a class="dropdown-item
-                                                        {%- if version.slug == page.docsVersion %} active{% endif -%}
+                                                        {%- if version.slug is same as page.docsVersion %} active{% endif -%}
                                                         {%- if versionUrl is null %} disabled{% endif -%}" href="{{ versionUrl }}">{{ version.name }}</a>
                                                 {% endif %}
                                             {% endfor %}