Updates tests to catch decimal/float/int errors in status serialization

bookwyrm/templates/snippets/generated_status/rating.html

@@ -1,3 +1,3 @@
 {% load i18n %}{% load humanize %}
 
-{% blocktrans with title=book.title path=book.remote_id rating=rating|floatformat:"0" count counter=rating %}Rated <em><a href="{{ path }}">{{ title }}</a></em>: {{ rating }} star{% plural %}Rated <em><a href="{{ path }}">{{ title }}</a></em>: {{ rating }} stars{% endblocktrans %}
+{% blocktrans with title=book.title path=book.remote_id display_rating=rating|floatformat:"0" count counter=rating %}Rated <em><a href="{{ path }}">{{ title }}</a></em>: {{ display_rating }} star{% plural %}Rated <em><a href="{{ path }}">{{ title }}</a></em>: {{ display_rating }} stars{% endblocktrans %}