style: change primary hover color of pop-up

Author: Aashutosh-Mishra

frontend/popup.css

@@ -16,7 +16,7 @@ body.dark-mode {
   --text-color: #f2f2f7;
   --subtle-text-color: #98989d;
   --primary-color: #0a84ff;
-  --primary-hover-color: #389dff;
+  --primary-hover-color: #5e9edd;
   --container-bg-color: #2c2c2e;
   --border-color: #3a3a3c;
 }