[IMP] website: set lead class font-size to match editor value

Currently, when you edit a paragraph with the lead class, the font-size
is set to x px. This value is not available in the font-size dropdown of
the editor. So no value is set as active (checked). With this change,
the lead font-size will now be 18px and match a default value from the
editor.

task-2209960

closes odoo/odoo#46902

Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/website/static/src/scss/bootstrap_overridden.scss

@@ -63,6 +63,8 @@ $h6-font-size: $font-size-base * $o-theme-h6-font-size-multiplier !default;
 $headings-font-family: $o-theme-headings-font !default;
 $headings-color: o-color('o-cc1-headings') !default;
 
+$lead-font-size: 1.125rem !default;
+
 $text-muted: mute-color($body-color) !default;
 
 // Buttons
@@ -114,6 +116,7 @@ $navbar-padding-y: if(index(('fill', 'pills', 'outline'), o-website-value('heade
 $navbar-nav-link-padding-x: if(index(('outline', 'block'), o-website-value('header-links-style')), .5rem * 3, null) !default;
 $navbar-nav-link-padding-x: if(o-website-value('header-links-style') == 'border-bottom', .5rem * 2, null) !default;
 
+
 // Jumbotron
 
 $jumbotron-bg: transparent !default;