Psycopg 2.9.4 released

What's new in psycopg 2.9.4
^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fix `~psycopg2.extras.register_composite()`,
  `~psycopg2.extras.register_range()` with customized search_path
  (:ticket:`#1487`).
- Handle correctly composite types with names or in schemas requiring escape.
- Find ``pg_service.conf file in the ``/etc/postgresql-common`` directory in
  binary packages (:ticket:`1365`).
- `~psycopg2.errorcodes` map and `~psycopg2.errors` classes updated to
  PostgreSQL 15.
- Wheel package compiled against OpenSSL 1.1.1q and PostgreSQL 14.4
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