[FIX] survey: Change certificates design

This PR decreases the opacity of dark squares and remove the white
background of the logo in the certification templates to make it look better

opw-2387563
https://www.odoo.com/web#id=2387563&action=4043&model=project.task&view_type=form&cids=1&menu_id=4720

closes odoo/odoo#62538

X-original-commit: 1262dfbaea13899147ed47ca35edfc387d21489c
Signed-off-by: Achraf <abz-odoo@users.noreply.github.com>

addons/survey/static/src/scss/survey_reports.scss

@@ -128,7 +128,7 @@
             .certification-bg-dark {
                 display: inline-block;
                 background-color: #223541;
-                color: white;
+                background: rgba(34, 53, 65, 0.1);
             }
 
             .certification-top {
@@ -140,7 +140,6 @@
                 }
 
                 .certification-company-wrapper {
-                    background-color: rgba(white, 0.9);
                     padding: 1mm 2mm;
 
                     img {