bundles/nginx: disable Federated Learning of Cohorts for all hosts

bundles/c3voc-addons/files/site_template

@@ -26,6 +26,8 @@ server {
     client_max_body_size 5M;
 % endif
 
+    add_header Permissions-Policy interest-cohort=();
+
     location /.well-known/acme-challenge/ {
         alias /var/www/dehydrated;
     }

bundles/nginx/files/site_template

@@ -42,6 +42,7 @@ server {
     add_header X-Content-Type-Options nosniff;
     add_header X-XSS-Protection "1; mode=block";
 % endif
+    add_header Permissions-Policy interest-cohort=();
 
     location /.well-known/acme-challenge/ {
         alias /var/lib/dehydrated/acme-challenges/;