* add a new version to it
upgrade the version of it
* find an error in line 47,update README.md
find an error in line 47 of README.md,the word 'tables' should be changed to 'table'
* Removing trailing space to pass lint
The README for the Percona chart claims that persistence is enabled by
default, but `persistence.enabled` defaults to `false` in `values.yaml`.
Fixes#1128.