[FIX] mass_mailing_crm: fix link in demo data

So that the link works...

Task-2954531

closes odoo/odoo#98310

X-original-commit: 617a4b8245315cbd47f83bed3e2ad74b105b5975
Signed-off-by: Florian Charlier (flch) <flch@odoo.com>
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/mass_mailing_crm/data/mass_mailing_demo.xml

@@ -58,7 +58,7 @@
                 </t>
                 <t t-if="object.company_id.website">
                 |
-                    <a href="'%s' % object.company_id.website" style="text-decoration:none; color: #999999;">
+                    <a t-att-href="'%s' % object.company_id.website" style="text-decoration:none; color: #999999;">
                         <t t-out="object.company_id.website" />
                     </a>
                 </t>