fix two broken links

Author: a-gave

_includes/nav_development.html

@@ -9,7 +9,7 @@
   {% if item.subpages %}
     <a class="md-nav__link  {% if page.url == doc_page.url %} md-nav__link--active{% endif %}" 
     style="display: flex; justify-content: space-between;" 
-    href="{% if page.url != doc_page.url %}{{site.prefix}}/{{ doc_page.url }}/{% else %}#{% endif %}">
+    href="{% if page.url != doc_page.url %}{{site.prefix}}{{ doc_page.url }}{% else %}#{% endif %}">
       <div>
         {% if doc_page.fontawesome_icon %}<i class="fa {{doc_page.fontawesome_icon}}" aria-hidden="true"></i>{% endif %}
         <span>{{ doc_page.title }}</span>

_includes/nav_packages.html

@@ -2,7 +2,7 @@
 {% if page.url contains '/packages/' %} md-nav__item--nested-open {% endif %}">
   <a class="md-nav__link  {% if page.url == doc_page.url %} md-nav__link--active{% endif %}" 
     style="display: flex; justify-content: space-between" 
-    href="{% if page.url != 'packages/' %}{{site.prefix}}/packages/{% else %}#{% endif %}">
+    href="{% if page.url != '/packages/' %}{{site.prefix}}/packages/#{% else %}{{site.prefix}}/packages/#{% endif %}">
     <div>
       <i class="fa fa-cube" aria-hidden="true"></i>
       <span>Packages</span>