Fix canonical URL ending with "/"

Author: gregberge

packages/gitbook/src/app/(site)/(content)/[[...pathname]]/page.tsx

@@ -165,7 +165,7 @@ export async function generateMetadata(props: PageProps): Promise<Metadata> {
  title: getTitle(data),
  description: page.description ?? '',
  alternates: {
- canonical: absoluteHref(getPagePath(pages, page), true),
+ canonical: absoluteHref(getPagePath(pages, page), true).replace(/\/+$/g, ''),
  },
  openGraph: {
  images: [