fix: buttons are stacked in modal window

Description:
We have stacked the buttons those come in modal window
VAN-1601

src/components/ModalView/index.jsx

@@ -5,6 +5,8 @@ import { ModalDialog, ActionRow, Button } from '@edx/paragon';
 import { useIntl } from '@edx/frontend-platform/i18n';
 import messages from './messages';
 
+import './index.scss';
+
 export const ModalView = ({
   isOpen,
   onClose,

src/components/ModalView/index.scss

@@ -0,0 +1,13 @@
+@import "@edx/paragon/scss/core/core";
+
+@media (max-width: 464px) {
+    .pgn__action-row{
+        flex-direction: column;
+        gap: 5px;
+        button {
+            width: 100%;
+        }
+    }
+}
+
+