fix(guide): add more headings

apps/guide/src/components/H2.tsx

@@ -0,0 +1,9 @@
+import type { HTMLAttributes, PropsWithChildren } from 'react';
+
+export default function H2({ children, className, ...props }: PropsWithChildren<HTMLAttributes<HTMLHeadingElement>>) {
+	return (
+		<h2 className={`group ${className}`} {...props}>
+			{children}
+		</h2>
+	);
+}