[Need Fix] Install Kubernetes deployment though helm failed

[gsxmax]

Issue Description:
We tried to follow this document to install SolidUI,
https://cloudorc.github.io/SolidUI-Website/docs/deployment/deployment-kubernetes

1. When using the lastest relase 0.4.0, we found it will hit below error during installation:

Error: INSTALLATION FAILED: YAML parse error on solidui/templates/cm-mysql.yaml: error converting YAML to JSON: yaml: line 41: could not find expected ':'
helm.go:88: [debug] error converting YAML to JSON: yaml: line 41: could not find expected ':'

By compareing with relase 0.3.0, there was a code indent issue on cm-mysql.yaml, please fix it.

2. It seems we need to create the solidui namespace first before doing the helm, please consider adding it into the document/helm chart, thanks.

[github-actions]

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