Update to Core 11.6.0

[sync-by-unito]

Update Realm-java to use Realm-core 11.6.0, it will introduce the following fixes:

• [RealmApp] Bug where progress notifiers continue to be called after the download of a synced realm is complete. (Issue Realm Core #4919)
• [RealmApp] User being left in the logged in state when the user's refresh token expires. (Issue Realm Core #4882, since v10)
• Using "sort", "distinct", or "limit" as field name in query expression would cause an "Invalid predicate" error. (Issue 7545(), since v10.X.X)
• Crash when quering with 'Not()' followed by empty group. (Issue Realm Core #4168 since v1.0.0)
• Streaming download notifiers reported incorrect values for transferrable bytes. (Issue Realm Core #5008 since v11.5.2)