Updated mediawiki/extensions
Project: mediawiki/extensions/BookManagerv2  6d417bcff63062c2ae0d8ffd8825da0324b3c86a

Use inNamespaces instead of comparing getNamespaces.

This is the preferred way, according to the docs.

Change-Id: I1192f8ff92d017975e6b0f5f7828d9c6db859e66