helm charts use versioned labels in spec.selector.matchLabels

[Deaddy]

Describe the bug
The helm charts use labels which include version in spec.selector.matchLabels, e.g. in
https://github.com/Sciebo-RDS/Sciebo-RDS/blob/develop/charts/layer0_web/templates/deployment.yaml#L16

This leads to errors when upgrading the helm charts, since these fields are immutable, requiring the user to delete/reinstall the helm chart.

To Reproduce
Steps to reproduce the behavior:

1. have helm chart on older version installed
2. try to install helm chart of newer version
3. get the usual garbage-looking-helm-error-message