Add Trino 466 release notes

docs/src/main/sphinx/release.md

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 ```{toctree}
 :maxdepth: 1
 
+release/release-466
 release/release-465
 release/release-464
 release/release-463

docs/src/main/sphinx/release/release-466.md

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+# Release 466 (27 Nov 2024)
+
+## General
+
+* Add support for changing the type of row fields when they are in a columns of
+  type `map`. ({issue}`24248`)
+* Remove the requirement for a Python runtime on Trino cluster nodes. ({issue}`24271`)
+* Improve performance of queries involving `GROUP BY` and joins. ({issue}`23812`)
+* Improve client protocol throughput by introducing the [spooling
+  protocol](protocol-spooling). ({issue}`24214`)
+
+## Security
+
+* Add support for [data access control with Apache
+  Ranger](/security/apache-ranger-access-control), including support for
+  column masking, row filtering, and audit logging. ({issue}`22675`)
+
+## JDBC driver
+
+* Improve throughput by automatically using the [spooling
+  protocol](jdbc-spooling-protocol) when it is configured on the Trino cluster,
+  and add the parameter `encoding` to optionally set the preferred encoding from
+  the JDBC driver. ({issue}`24214`)
+* Improve decompression performance when running the client with Java 22 or
+  newer. ({issue}`24263`)
+* Improve performance `java.sql.DatabaseMetaData.getTables()`. ({issue}`24159`,
+  {issue}`24110`)
+
+## Server RPM
+
+* Remove Python requirement. ({issue}`24271`)
+
+## Docker image
+
+* Remove Python runtime and libraries. ({issue}`24271`)
+
+## CLI
+
+* Improve throughput by automatically use the [spooling
+  protocol](cli-spooling-protocol) when it is configured on the Trino cluster,
+  and add the option `--encoding` to optionally set the preferred encoding from
+  the CLI. ({issue}`24214`)
+* Improve decompression performance when running the CLI with Java 22 or newer. ({issue}`24263`)
+
+## BigQuery connector
+
+* Add support for `LIMIT` pushdown. ({issue}`23937`)
+
+## Iceberg connector
+
+* Add support for the [object store file
+  layout](https://iceberg.apache.org/docs/latest/aws/#object-store-file-layout).
+  ({issue}`8861`)
+* Add support for changing field types inside a map. ({issue}`24248`)
+* Improve performance of queries with selective joins. ({issue}`24277`)
+* Fix failure when reading columns containing nested row types that differ from
+  the schema of the underlying Parquet data. ({issue}`22922`)
+
+## Phoenix connector
+
+* Improve performance for `MERGE` statements. ({issue}`24075`)
+
+## SQL Server connector
+
+* Rename the `sqlserver.experimental.stored-procedure-table-function-enabled`
+  configuration property to `sqlserver.stored-procedure-table-function-enabled`.
+  ({issue}`24239`)
+
+## SPI
+
+* Add `ConnectorSplit` argument to the `SystemTable.cursor()` method. ({issue}`24159`)
+* Add support for partial row updates to the `ConnectorMetadata.beginMerge()`
+  method. ({issue}`24075`)