message: changelog fixup
diff: ### Bugfixes
  * Fixed bug when encryption was used. It would cause crashes and corrupted data
  (sometimes pieces of data from earlier commits could be seen). PR #2465.
  + (fixes https://github.com/realm/realm-core/issues/2383)
  * Added SharedGroupOptions::set_sys_tmp_dir() and
  SharedGroupOptions::set_sys_tmp_dir() to solve crash when compacting a Realm
  file on Android external storage which is caused by invalid default sys_tmp_dir.
  