Fix permalink path in book redirect

Changed the permalink in book.md from '/book' to '/book/' to ensure correct URL formatting for redirection.

Author: potatoqualitee

redirect/book.md

@@ -3,5 +3,5 @@ layout: redirected
 sitemap: false
 redirect_to:
   - https://www.manning.com/books/learn-dbatools-in-a-month-of-lunches?a_aid=clemaire&
-permalink: /book
+permalink: /book/
 ---