Remove 'Preview' label from pg_ivm extension

Author: akashraokm

articles/postgresql/extensions/includes/extensions-tables-by-engine-18.md

@@ -51,7 +51,7 @@ ms.custom:
 | [pg_failover_slots](https://github.com/EnterpriseDB/pg_failover_slots) is a logical replication slot manager for failover purposes. | Not supported <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter.<br />Read the special considerations for extension [pg_failover_slots](../concepts-extensions-considerations.md#pg_failover_slots) in flexible server. |
 | [pg_freespacemap](https://www.postgresql.org/docs/current/pgfreespacemap.html) examines the free space map (FSM). | 1.3 | |
 | [pg_hint_plan](https://github.com/ossc-db/pg_hint_plan) makes it possible to tweak PostgreSQL execution plans using so-called hints in SQL comments. | 1.8.0 <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter.<br />Read the special considerations for extension [pg_hint_plan](../concepts-extensions-considerations.md#pg_hint_plan) in flexible server. |
-| [pg_ivm](https://github.com/sraoss/pg_ivm) (Preview) provides Incremental View Maintenance (IVM) feature for PostgreSQL. | 1.13 <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter. |
+| [pg_ivm](https://github.com/sraoss/pg_ivm) provides Incremental View Maintenance (IVM) feature for PostgreSQL. | 1.13 <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter. |
 | [pglogical](https://github.com/2ndQuadrant/pglogical) manages PostgreSQL Logical Replication. | 2.4.6 <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter. |
 | [pg_partman](https://github.com/pgpartman/pg_partman) manages partitioned tables by time or ID. | 5.3.1 <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter. |
 | [pg_partman_bgw](https://github.com/pgpartman/pg_partman) manages partitioned tables by time or ID. | 5.0.1 <sup>*</sup> | <sup>*</sup> Enable corresponding libraries in the `shared_preload_libraries` server parameter. |