Fix timescale & partman Versions in Release Notes

Issue: [sc-15290]

Author: andrewlecuyer

docs/content/releases/4.5.8.md

@@ -13,5 +13,5 @@ PostgreSQL Operator 4.5.8 release includes the following software versions upgra
 
 - [PostgreSQL](https://www.postgresql.org) versions 13.8, 12.12, 11.17, and 10.22 are now available.
 - [PgBouncer](https://www.pgbouncer.org/) is now at version 1.17.
-- The [pg_partman](https://github.com/pgpartman/pg_partman) extension is now at version 4.6.0.
-- The [TimescaleDB](https://github.com/timescale/timescaledb) extension is now at version 2.7.1.
+- The [pg_partman](https://github.com/pgpartman/pg_partman) extension is now at version 4.6.2.
+- The [TimescaleDB](https://github.com/timescale/timescaledb) extension is now at version 2.7.2.