Change styleguide wording on crispy-forms

We don't use crispy-forms any more, but our internal form template
system mimics the subset of crispy-forms that we were once using.

python/nav/web/templates/styleguide.html

@@ -399,8 +399,8 @@ <h5>jQuery UI Tabs</h5>
     <div class="small-6 column">
       <h3 class="underline">Forms</h3>
       <p>
-        We use <a href="http://django-crispy-forms.readthedocs.org/en/latest/">django-crispy-forms</a>
-        for "easy" and nice form layout. The advantages are:
+        We use a "django-crispy-forms-inspired" template system for "easy" and nice form layout.
+        The advantages are:
       </p>
 
       <ul>