Fix link on nsis page

i2p2www/pages/downloads/nsis.html

@@ -10,7 +10,7 @@ software and all of it's dependencies in a single, easy-to-install package. It
 is built on the premise that I2P should be easy, and that we should help our
 users get their initial configuration in place instead of requiring an elaborate
 install process. To learn more about the Firefox profile that comes bundled with
-this installer, visit <a href="{{ nsis }}">The Firefox Profile Page</a>.
+this installer, visit <a href="{{ firefox }}">The Firefox Profile Page</a>.
 {%- endtrans %}</p>
 <h2>{{ _('Is it a Zero-Dependency I2P Browser?') }}</h2>
 <p><strong>{% trans -%}