Prepare v0.5.0 release

Author: calind

Changelog.md

@@ -6,6 +6,12 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
 ## [Unreleased]
+### Added
+### Changed
+### Removed
+### Fixed
+
+## [0.5.0] - 2021-10-06
 ### Added
  * Add `image` and `mysqlVersion` options to MysqlCluster chart. This bumps the chart version to `0.3.1`
  * Add `backupAffinity`, `backupNodeSelector`, `backupPriorityClassName`, `backupTolerations`