Fix canonical URL ending with "/"

Author: gregberge

packages/gitbook/src/lib/links.ts

@@ -82,7 +82,9 @@ export function baseUrl(): string {
  */
 export function absoluteHref(href: string, withHost: boolean = false): string {
     const base = withHost ? baseUrl() : basePath();
-    return `${base}${href.startsWith('/') ? href.slice(1) : href}`;
+    const absoluteHref = `${base}${href.startsWith('/') ? href.slice(1) : href}`;
+    // Trim trailing slashes
+    return absoluteHref.replace(/\/$/, '');
 }
 
 /**