[FIX] web: update font-display for fa

Partial backport of https://github.com/FortAwesome/Font-Awesome/pull/16353/commits/e446f7e16ba3904a36babba767c739f1da6eae3e
To remove warning in lighthouse

closes odoo/odoo#53416

X-original-commit: 4ac592d4d99de478072a417c479efe97d15952d5
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>

addons/web/static/lib/fontawesome/css/font-awesome.css

@@ -10,6 +10,7 @@
   src: url('../fonts/fontawesome-webfont.eot?#iefix&v=4.7.0') format('embedded-opentype'), url('../fonts/fontawesome-webfont.woff2?v=4.7.0') format('woff2'), url('../fonts/fontawesome-webfont.woff?v=4.7.0') format('woff'), url('../fonts/fontawesome-webfont.ttf?v=4.7.0') format('truetype'), url('../fonts/fontawesome-webfont.svg?v=4.7.0#fontawesomeregular') format('svg');
   font-weight: normal;
   font-style: normal;
+  font-display: block;
 }
 .fa {
   display: inline-block;