Fix: Use striptags for page title to preserve ampersand (django-cms/d…

…jango-cms#7859)

djangocms_frontend/templates/djangocms_frontend.html

@@ -15,7 +15,7 @@
                 <meta property="og:url" content="{{ request.build_absolute_uri|urlencode:"&?" }}"/>
             {% endblock canonical_url %}
             {% block fb_meta %}{% endblock fb_meta %}
-            <title>{% block title %}{% page_attribute "page_title" %}{% endblock %}</title>
+            <title>{% block title %}{{ request.current_page.get_page_title|striptags }}{% endblock %}</title>
             {% block base_css %}{% endblock %}
 {% endspaceless %}{% render_block 'css' %}{% spaceless %}
     {% block page_head %}{% endblock %}