Remove two more articles|sort constructs.

This is the issue getpelican#483 which was
supposed to be fixed by getpelican#506 (and commit
f1a4bba), but two occurences of
the problem were missed.

Basically, as
getpelican/pelican#1591 (comment)
says:

> For future reference: Don't use sort in templates on articles.

uikit/templates/articles.html

@@ -12,7 +12,7 @@
 <h1>{{'all the articles'|capitalize}}</h1>
 
 <ul>
-{% for article in articles|sort %}
+{% for article in articles %}
     <li><a class="{% if CAPITALIZE_HEADINGS %}capitalize{% endif %}" href="/{{ article.url }}">{{ article.title }}</a></li>
 {% endfor %}
 </ul>

zurb-F5-basic/templates/tags.html

@@ -2,7 +2,7 @@
 {% block content %}
 
 <ul class="circle">
-    {% for tag, articles in tags|sort %}
+    {% for tag, articles in tags %}
 	<li><a href="{{ SITEURL }}/{{ tag.url }}">{{ tag }}</a></li>
 	<ul class="square">
 	{% for article in articles %}
@@ -12,4 +12,4 @@
     {% endfor %}
 </ul>
 
-{% endblock %}
+{% endblock %}