[gi-docgen] template: Fix the link to interface implementations

[Emmanuele Bassi <ebassi src gnome org>]

commit e50c3a272f5f8d6a7efd34261b51643ecf54895a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Oct 21 12:58:27 2021 +0100

    template: Fix the link to interface implementations
    
    Classes implement interfaces.

 gidocgen/templates/basic/interface.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gidocgen/templates/basic/interface.html b/gidocgen/templates/basic/interface.html
index d895306..ea6f994 100644
--- a/gidocgen/templates/basic/interface.html
+++ b/gidocgen/templates/basic/interface.html
@@ -141,7 +141,7 @@ SPDX-License-Identifier: Apache-2.0 OR GPL-3.0-or-later
       <div class="docblock">
         <ul>
         {%- for impl in interface.implementations %}
-          <li><a href="iface.{{ impl.name }}.html">{{ impl.ctype }}</a></li>
+          <li><a href="class.{{ impl.name }}.html">{{ impl.ctype }}</a></li>
         {% endfor -%}
         </ul>
       </div>