[Site] Improve contrast on IconModal

Author: Kocal

ux.symfony.com/assets/styles/components/_IconModal.scss

@@ -176,7 +176,7 @@
   padding: 0.35rem 0.5rem;
   border-radius: .5rem;
   border: 1px solid var(--bs-dark-border-subtle);
-  background: var(--bs-secondary-bg-subtle);
+  background: var(--bs-secondary-bg);
   overflow: hidden;
   position: relative;
   opacity: .8;
@@ -212,7 +212,7 @@
 }
 
 .IconModal__code span {
-  color: lightskyblue;
+  color: var(--bs-code-color);
 }
 
 .IconModal__copy {
@@ -238,4 +238,3 @@
 .IconModal__main h3:first-child {
   padding-top: 0;
 }
-

ux.symfony.com/assets/styles/components/_Tabs.scss

@@ -30,7 +30,7 @@
   transition: background-color 150ms ease-in-out;
 }
 .TabControl.active {
-  background: var(--bs-secondary-bg);
+  background: var(--bs-tertiary-bg);
 }
 
 .TabPanel {