jkube: Config Map Enricher appears to be loosing quotes and then corrupting data

Describe the bug

Hi, I have an example where we have a configmap template with data like this

data:
  report_date: "2020-01-01"

After the resource action the kubernetes yml has this

data:
  report_date: 2020-01-01

which then results in a right mess in the deployed CM with the response json showing this

"report_date" : "1577836800000"

I cant for the life of me understand why the quotes would be dropped but I am hoping its something easy to rectify

Eclipse JKube version

1.8.0

Component

Kubernetes Maven Plugin

Apache Maven version

3.8.3

Gradle version

No response

Steps to reproduce

1: create a configmap template with the following

data:
  report_date: "2020-01-01"

run mvn k8s:resource the resultant hydrated manifest will be

data:
  report_date: 2020-01-01

Expected behavior

should be

data:
  report_date: "2020-01-01"

Runtime

Kubernetes (vanilla)

Kubernetes API Server version

other (please specify in additional context)

Environment

Linux

Eclipse JKube Logs

No response

Sample Reproducer Project

No response

Additional context

kubernetes 1.19