Copy release notes from release-18.0 into main

This commit was made automatically by the vitess-releaser tool.

See https://github.com/vitessio/vitess-releaser

Signed-off-by: Shlomi Noach <[email protected]>

changelog/18.0/18.0.6/changelog.md

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+# Changelog of Vitess v18.0.6
+
+### Bug fixes 
+#### Docker
+ * [release-18.0] Fix the install dependencies script in Docker (#16340) [#16345](https://github.com/vitessio/vitess/pull/16345) 
+#### Query Serving
+ * [release-18.0] fix: handle info_schema routing (#15899) [#15905](https://github.com/vitessio/vitess/pull/15905)
+ * [release-18.0] fix: remove keyspace when merging subqueries (#16019) [#16026](https://github.com/vitessio/vitess/pull/16026)
+ * [release-18.0] Fix Incorrect Optimization with LIMIT and GROUP BY (#16263) [#16266](https://github.com/vitessio/vitess/pull/16266)
+ * [release-18.0] planner: Handle ORDER BY inside derived tables (#16353) [#16358](https://github.com/vitessio/vitess/pull/16358)
+ * [release-18.0] Fix Join Predicate Cleanup Bug in Route Merging (#16386) [#16388](https://github.com/vitessio/vitess/pull/16388) 
+#### VReplication
+ * [release-18.0] vtctldclient: Apply (Shard | Keyspace| Table) Routing Rules commands don't work (#16096) [#16123](https://github.com/vitessio/vitess/pull/16123)
+ * [release-18.0] VDiff CLI: Fix VDiff `show` bug (#16177) [#16197](https://github.com/vitessio/vitess/pull/16197)
+ * [release-18.0] VReplication Workflow: set state correctly when restarting workflow streams in the copy phase (#16217) [#16221](https://github.com/vitessio/vitess/pull/16221)
+ * [release-18.0] VReplication: Properly handle target shards w/o a primary in Reshard (#16283) [#16290](https://github.com/vitessio/vitess/pull/16290) 
+#### VTTablet
+ * [18.x] Fix `schemacopy` collation issues [#15859](https://github.com/vitessio/vitess/pull/15859) 
+#### VTorc
+ * [release-18.0] Add timeout to all the contexts used for RPC calls in vtorc (#15991) [#16104](https://github.com/vitessio/vitess/pull/16104) 
+#### vtexplain
+ * [release-18.0] Fix `vtexplain` not handling `UNION` queries with `weight_string` results correctly. (#16129) [#16156](https://github.com/vitessio/vitess/pull/16156)
+### CI/Build 
+#### Build/CI
+ * [release-18.0] Add DCO workflow (#16052) [#16055](https://github.com/vitessio/vitess/pull/16055)
+ * [release-18.0] Remove DCO workaround (#16087) [#16090](https://github.com/vitessio/vitess/pull/16090)
+ * [release-18.0] CI: Fix for xtrabackup install failures (#16329) [#16331](https://github.com/vitessio/vitess/pull/16331) 
+#### General
+ * [release-18.0] Upgrade the Golang version to `go1.21.11` [#16063](https://github.com/vitessio/vitess/pull/16063)
+ * [release-18.0] Upgrade the Golang version to `go1.21.12` [#16320](https://github.com/vitessio/vitess/pull/16320)
+### Dependencies 
+#### VTAdmin
+ * [release-18.0] Update braces package (#16115) [#16117](https://github.com/vitessio/vitess/pull/16117)
+### Internal Cleanup 
+#### Examples
+ * [release-18.0] Update env.sh so that is does not error when running on Mac (#15835) [#15914](https://github.com/vitessio/vitess/pull/15914)
+### Performance 
+#### VTTablet
+ * [release-18.0] Do not load table stats when booting `vttablet`. (#15715) [#16099](https://github.com/vitessio/vitess/pull/16099)
+### Regression 
+#### Query Serving
+ * [release-18.0] fix: insert on duplicate update to add list argument in the bind variables map (#15961) [#15966](https://github.com/vitessio/vitess/pull/15966)
+### Release 
+#### General
+ * [release-18.0] Bump to `v18.0.6-SNAPSHOT` after the `v18.0.5` release [#15888](https://github.com/vitessio/vitess/pull/15888)
+ * [release-18.0] Code Freeze for `v18.0.6` [#16444](https://github.com/vitessio/vitess/pull/16444)
+### Testing 
+#### Query Serving
+ * [release-18.0] test: Cleaner plan tests output (#15922) [#15923](https://github.com/vitessio/vitess/pull/15923)
+ * [release-18] Vitess tester workflow (#16127) [#16419](https://github.com/vitessio/vitess/pull/16419) 
+#### VTCombo
+ * [release-18.0] Fix flaky tests that use vtcombo (#16178) [#16211](https://github.com/vitessio/vitess/pull/16211) 
+#### vtexplain
+ * [release-18.0] Fix flakiness in `vtexplain` unit test case. (#16159) [#16166](https://github.com/vitessio/vitess/pull/16166)
+

changelog/18.0/18.0.6/release_notes.md

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+# Release of Vitess v18.0.6
+The entire changelog for this release can be found [here](https://github.com/vitessio/vitess/blob/main/changelog/18.0/18.0.6/changelog.md).
+
+The release includes 28 merged Pull Requests.
+
+Thanks to all our contributors: @GuptaManan100, @app/vitess-bot, @arthurschreiber, @shlomi-noach, @vitess-bot
+

changelog/18.0/README.md

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 ## v18.0
+* **[18.0.6](18.0.6)**
+	* [Changelog](18.0.6/changelog.md)
+	* [Release Notes](18.0.6/release_notes.md)
+
 * **[18.0.5](18.0.5)**
 	* [Changelog](18.0.5/changelog.md)
 	* [Release Notes](18.0.5/release_notes.md)