[gtk-web/new-website] Link to the trademark policy from the footer

[Emmanuele Bassi <ebassi src gnome org>]

commit 8d080bf678d04f4acbd2d0f11dad2bd00cbe5630
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Feb 18 18:30:42 2020 +0000

    Link to the trademark policy from the footer

 _includes/footer.html | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/_includes/footer.html b/_includes/footer.html
index 8210b69..7bdb07b 100644
--- a/_includes/footer.html
+++ b/_includes/footer.html
@@ -16,7 +16,8 @@ to make changes related to the content, edit the `_data/navigation.yml`
         <p>GTK is maintained by the <strong><a href="{{ '/community#contributors' | prepend: site.url }}" 
class="text-muted">GTK Team</a></strong>.</p>
         {% assign date_arr = site.time | date_to_string | split: ' ' %}
         {% assign year = date_arr[2] %}
-        <p>&copy; 2007-{{ year }}, The GTK Team. All Rights Reserved.</p>
+        <p>&copy; 1997-{{ year }}, The GTK Team. All Rights Reserved.</p>
+        <p>GTK and the GTK logo are <a 
href="https://wiki.gnome.org/FoundationBoard/Resources/Trademark";>trademarks of the GNOME Foundation</a>.</p>
       </div>
       <div class="col-12 col-sm-7 col-md-5 py-3 py-sm-2">
         <div class="d-flex">