k6 links: https

Previously only http:// worked.
QR-code is kept http://, as the stickers were generated such.

inventory-app/templates/inventory.html

@@ -35,7 +35,7 @@
         >
           <td>
             {% if item.shortener %}
-              <a href="http://k6.ee/{{ item.shortener.slug }}">{{ item.shortener.slug }}</a>
+              <a href="https://k6.ee/{{ item.shortener.slug }}">{{ item.shortener.slug }}</a>
             {% endif %}
           </td>
           <td>{{ item.inventory.visibility }}</td>

inventory-app/templates/inventory_public.html

@@ -19,7 +19,7 @@
         <tr>
           <td>
             {% if item.shortener %}
-              <a href="http://k6.ee/{{ item.shortener.slug }}">{{ item.shortener.slug }}</a>
+              <a href="https://k6.ee/{{ item.shortener.slug }}">{{ item.shortener.slug }}</a>
             {% endif %}
           </td>
           <td><a href="/m/inventory/{{ item._id }}/view">{{ item | format_name }} {{ item.comment }}</a></td>

inventory-app/templates/inventory_view.html

@@ -43,7 +43,7 @@
         <td>
         {% if item.get("shortener").slug %}
           {{ item.get("shortener", {}).get("slug") | qr_code }}
-          <a href="http://k6.ee/{{ item.get("shortener").slug }}">
+          <a href="https://k6.ee/{{ item.get("shortener").slug }}">
             k6.ee/{{ item.get("shortener").slug }}
           </a>
         {% endif %}

inventory-app/templates/inventory_view_public.html

@@ -18,7 +18,7 @@
         <td>
         {% if item.get("shortener").slug %}
           {{ item.get("shortener", {}).get("slug") | qr_code }}
-          <a href="http://k6.ee/{{ item.get("shortener").slug }}">
+          <a href="https://k6.ee/{{ item.get("shortener").slug }}">
             k6.ee/{{ item.get("shortener").slug }}
           </a>
         {% endif %}