Refs #26034 -- Added another case fixed by this ticket to release notes.

  the admin calendar widget for timezones from GMT+0100 to GMT+1200

  (:ticket:`24980`).

* Fixed incorrect index handling in migrations on PostgreSQL when adding

  ``db_index=True`` or ``unique=True`` to a ``CharField`` or ``TextField`` that

  already had the other specified, or when removing one of them from a field

  that had both (:ticket:`26034`).

* Fixed a regression in 1.8.8 causing incorrect index handling in migrations on

  PostgreSQL when adding ``db_index=True`` or ``unique=True`` to a

  ``CharField`` or ``TextField`` that already had the other specified, or when

  removing one of them from a field that had both, or when adding

  ``unique=True`` to a field already listed in ``unique_together``

  (:ticket:`26034`).

* Fixed a crash when using an ``__in`` lookup inside a ``Case`` expression

  (:ticket:`26071`).