Copy v18.0.5 release notes on main (#15886)

changelog/18.0/18.0.5/changelog.md

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+# Changelog of Vitess v18.0.5
+
+### Bug fixes 
+#### Query Serving
+ * [release-18.0] fix: don't forget DISTINCT for derived tables (#15672) [#15677](https://github.com/vitessio/vitess/pull/15677)
+ * [release-18.0] Fix panic in aggregation (#15728) [#15735](https://github.com/vitessio/vitess/pull/15735)
+ * [release-18.0] Fix wrong assignment to `sql_id_opt` in the parser (#15862) [#15868](https://github.com/vitessio/vitess/pull/15868) 
+#### Topology
+ * [release-18.0] Fix ZooKeeper Topology connection locks not being cleaned up correctly (#15757) [#15763](https://github.com/vitessio/vitess/pull/15763) 
+#### VReplication
+ * [release-18.0] VReplication: Take replication lag into account in VStreamManager healthcheck result processing (#15761) [#15773](https://github.com/vitessio/vitess/pull/15773) 
+#### VTAdmin
+ * [release-18.0] [VTAdmin API] Fix schema cache flag, add documentation (#15704) [#15719](https://github.com/vitessio/vitess/pull/15719)
+ * [VTAdmin] Remove vtctld web link, improve local example (#15607) [#15825](https://github.com/vitessio/vitess/pull/15825)
+### CI/Build 
+#### General
+ * [release-18.0] Upgrade the Golang version to `go1.21.10` [#15866](https://github.com/vitessio/vitess/pull/15866) 
+#### VReplication
+ * [release-18.0] VReplication: Get workflowFlavorVtctl endtoend testing working properly again (#15636) [#15666](https://github.com/vitessio/vitess/pull/15666) 
+#### VTAdmin
+ * [release-18.0] Update VTAdmin build script (#15839) [#15849](https://github.com/vitessio/vitess/pull/15849)
+### Performance 
+#### VTTablet
+ * [release-18.0] Improve performance for `BaseShowTablesWithSizes` query. (#15713) [#15793](https://github.com/vitessio/vitess/pull/15793)
+### Regression 
+#### Query Serving
+ * [release-18.0] Direct PR. Fix regression where reference tables with a different name on sharded keyspaces were not routed correctly. [#15788](https://github.com/vitessio/vitess/pull/15788)
+### Release 
+#### General
+ * [release-18.0] Bump to `v18.0.5-SNAPSHOT` after the `v18.0.4` release [#15660](https://github.com/vitessio/vitess/pull/15660)
+ * [release-18.0] Code Freeze for `v18.0.5` [#15876](https://github.com/vitessio/vitess/pull/15876)
+

changelog/18.0/18.0.5/release_notes.md

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+# Release of Vitess v18.0.5
+The entire changelog for this release can be found [here](https://github.com/vitessio/vitess/blob/main/changelog/18.0/18.0.5/changelog.md).
+
+The release includes 14 merged Pull Requests.
+
+Thanks to all our contributors: @app/vitess-bot, @notfelineit, @rohit-nayak-ps, @shlomi-noach, @vitess-bot
+

changelog/18.0/README.md

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 ## v18.0
+* **[18.0.5](18.0.5)**
+	* [Changelog](18.0.5/changelog.md)
+	* [Release Notes](18.0.5/release_notes.md)
+
 * **[18.0.4](18.0.4)**
 	* [Changelog](18.0.4/changelog.md)
 	* [Release Notes](18.0.4/release_notes.md)