Release 2.2.6.

Author: bgrainger

docs/content/overview/version-history.md

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-lastmod: 2023-01-01
+lastmod: 2023-05-04
 date: 2017-03-27
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 # Version History
 
+### 2.2.6
+
+* Ignore deadlock exception when rolling back an XA transaction: [#1317](https://github.com/mysql-net/MySqlConnector/issues/1317).
+* Work around ephemeral PEM bug on Windows: [#1278](https://github.com/mysql-net/MySqlConnector/issues/1278).
+* Support new MariaDB version numbers: [#1259](https://github.com/mysql-net/MySqlConnector/issues/1259).
+* Thanks to [Diego Dupin](https://github.com/rusher) for contributions to this release.
+
 ### 2.2.5
 
 * Add support for `DECIMAL UNSIGNED`, fixing error in `DeriveParameters`: [#1272](https://github.com/mysql-net/MySqlConnector/issues/1272).