[Accessibility] [Keyboard Navigation] Fix luminosity ratio in Bot Explorer list items (#2340)

* Fixed luminosity ratio in bot explorer list items

* Removed duplicated style

Co-authored-by: Federico Bernal <64086728+FedericoBernal@users.noreply.github.com>

packages/app/client/src/ui/styles/themes/light.css

@@ -6,7 +6,7 @@ html {
   --box-shadow-color: var(--neutral-6);
 
   /* Highlight colors */
-  --list-item-color: var(--neutral-9);
+  --list-item-color: #605E5C;
   --list-item-selected-color: var(--neutral-2);
   --list-item-hover-bg: var(--neutral-4);
   --list-item-hover-border: 1px dashed transparent;