fix: indentation of extra volume mounts in deployment.yaml

[Fapiko]

This was causing an issue where it couldn't properly decode extra volume mounts due to the indentation being out of alignment:

Error: YAML parse error on sql-exporter/templates/deployment.yaml: error converting YAML to JSON: yaml: line 48: did not find expected key
helm.go:84: [debug] error converting YAML to JSON: yaml: line 48: did not find expected key

[burningalchemist]

Hey @Fapiko, thanks for finding the issue and contributing a fix. I'll test it shortly, and create a new release.

[burningalchemist]

@Fapiko could you please bump up a chart release version here to 0.4.5;

And also run make gen_docs command from the helm directory.

[Fapiko]

@burningalchemist Done

[burningalchemist]

Released as 0.4.5 🚀