Chart "raw": improve regex to split objects in input templates

[LeonoreMangold]

Issue found when trying to create a ConfigMap containing a certificate bundle with:

templates:
  - |
    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: se-ca-bundle
      labels:
        app.kubernetes.io/instance: kube-prometheus-stack
    data:
      se-ca-bundle.crt: {{ .Values.seCertBundle | quote }}

seCertBundle: |
  -----BEGIN CERTIFICATE-----
  xxx
  -----END CERTIFICATE-----

The "---" characters in the "-----BEGIN CERTIFICATE-----" are interpreted by the chart as a separator between distinct Kubernetes manifests, thus breaking the rendering of the ConfigMap.

[LeonoreMangold]

@Neewolag Sorry I had left an little mistake in my regex, I've just fixed it.

[Neewolag]

Oh yes, that was a sneaky one