fix: resolve CSS conflict between AlertBox and markdown styles

- Keep background color at bg-info-600 as per design system
- Add !important to paragraph color to override markdown styles
- Fix text color conflict where p tags inherit markdown paragraph styles

The issue was a CSS specificity conflict. Paragraph elements inside
AlertBox were inheriting black text color from markdown styles instead
of maintaining the white text color defined in AlertBox styles.

Fixes #8290

Author: Ju-MINJAE

packages/ui-components/src/Common/AlertBox/index.module.css

@@ -15,6 +15,10 @@
     text-sm
     text-white;
 
+  p {
+    color: white !important;
+  }
+
   a {
     @apply font-bold
       text-white