fix: add missing safelist class (#527)

uno.config.ts

@@ -33,5 +33,5 @@ export default defineConfig({
     transformerDirectives(),
     transformerVariantGroup(),
   ],
-  safelist: 'prose m-auto text-left'.split(' '),
+  safelist: 'prose prose-sm m-auto text-left'.split(' '),
 })