Updated mediawiki/extensions
Project: mediawiki/extensions/BookManager  9ed34fd58da333039f97a5c1158f6d6fcfbb84e2

(bug 30994) Use wgContentNamespaces instead of NS_MAIN for wgBookManagerNamespaces.

Because some wikis use other namespaces than "main" for their content, the wgContentNamespaces variable is more appropriate.

Bug: 30994
Change-Id: I4a78426380d8fc4106e57c24e94e7b17749567cc