fix:Update /help to show correct newline key combo for different OS #… (#2043)

Co-authored-by: Allen Hutchison <adh@google.com>

packages/cli/src/ui/components/Help.tsx

@@ -97,9 +97,11 @@ export const Help: React.FC<Help> = ({ commands }) => (
     </Text>
     <Text color={Colors.Foreground}>
       <Text bold color={Colors.AccentPurple}>
-        Shift+Enter
+        {process.platform === 'win32' ? 'Ctrl+Enter' : 'Ctrl+J'}
       </Text>{' '}
-      - New line
+      {process.platform === 'linux'
+        ? '- New line (Alt+Enter works for certain linux distros)'
+        : '- New line'}
     </Text>
     <Text color={Colors.Foreground}>
       <Text bold color={Colors.AccentPurple}>