CrOS Settings: Update keyboard shortcut banner styles to match specs

Spec link:
https://www.figma.com/file/1mBE5YYqXYS4A8wiRSNWlR/Square---K-Next?
type=design&node-id=104-243133&mode=design&t=0nJC3oJB7AsaJZHC-0

Screenshots:
- Before update: https://screenshot.googleplex.com/5J5eK6UMaW4oumm
- After update: https://screenshot.googleplex.com/6THNzop9ZVpatYH

Bug: b/314982885
Change-Id: I8e01ba05b723f78170e8031f1eb5e1bbb96936ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5120107
Commit-Queue: Connie Xu <conniekxu@chromium.org>
Reviewed-by: Wes Okuhara <wesokuhara@google.com>
Cr-Commit-Position: refs/heads/main@{#1237373}
diff --git a/chrome/browser/resources/ash/settings/keyboard_shortcut_banner/keyboard_shortcut_banner.html b/chrome/browser/resources/ash/settings/keyboard_shortcut_banner/keyboard_shortcut_banner.html
index 07c568e..a83c558 100644
--- a/chrome/browser/resources/ash/settings/keyboard_shortcut_banner/keyboard_shortcut_banner.html
+++ b/chrome/browser/resources/ash/settings/keyboard_shortcut_banner/keyboard_shortcut_banner.html
@@ -38,16 +38,15 @@
 
   /* Shortcut pods */
   kbd > kbd {
-    background-color: var(--cros-shortcut-background-color);
+    background-color: var(--cros-sys-surface_variant);
     background-image: linear-gradient(
       var(--cros-shortcut-background-gradient-color),
       var(--cros-shortcut-background-gradient-color));
-    border-radius: 18px;
-    box-shadow: var(--cr-elevation-1);
-    color: var(--cr-secondary-text-color);
+    border-radius: 12px;
+    color: var(--cros-text-color-secondary);
+    font: var(--cros-button-2-font);
     display: inline-block;
     height: 20px;
-    line-height: 20px;
     margin: 0 4px;
     padding: 0 6px;
   }