update the list of supported Postgres extensions

docs/database-lab/supported-databases.md

@@ -29,10 +29,10 @@ All these extended images include the following extensions:
 - [logerrors](https://github.com/munakoiso/logerrors) (only for Postgres 10+)
 - [bg_mon](https://github.com/CyberDem0n/bg_mon)
 - [pg_auth_mon](https://github.com/RafiaSabih/pg_auth_mon)
-- [PoWA](https://github.com/powa-team/powa) (only for Postgres 9.6-16)
+- [PoWA](https://github.com/powa-team/powa)
 - [pg_hint_plan](https://pghintplan.osdn.jp/pg_hint_plan.html)
 - [Timescale](https://github.com/timescale/timescaledb) (only for Postgres 12+)
-- [Citus](https://github.com/citusdata/citus) (only for Postgres 11-16)
+- [Citus](https://github.com/citusdata/citus) (only for Postgres 11+)
 - [HypoPG](https://github.com/HypoPG/hypopg)
 - [pg_cron](https://github.com/citusdata/pg_cron)
 - [pg_qualstats](https://github.com/powa-team/pg_qualstats)
@@ -43,7 +43,7 @@ All these extended images include the following extensions:
 - [pg_timetable](https://github.com/cybertec-postgresql/pg_timetable)
 - [pgextwlist](https://github.com/dimitri/pgextwlist)
 - [hll](https://github.com/citusdata/postgresql-hll)
-- [topn](https://github.com/citusdata/postgresql-topn) (only for Postgres 10-16)
+- [topn](https://github.com/citusdata/postgresql-topn) (only for Postgres 10+)
 - [postgresql_anonymizer](https://github.com/webysther/postgresql_anonymizer)
 - [pgaudit](https://github.com/pgaudit/pgaudit)
 - [set_user](https://github.com/pgaudit/set_user) (only for Postgres 10+)