fix location

Author: BastienVigneron

Diff for: docs/book.toml

@@ -5,7 +5,10 @@ multilingual = false
 src = "src"
 title = "Biscuit"
 
-[output.html.playground]
-runnable = false
+[output.html]
 git-repository-url = "https://github.com/biscuit-auth/biscuit"
 git-repository-icon = "fa-github"
+
+[output.html.playground]
+runnable = false
+