chore(kube-external-secrets): bump wrapper to upstream chart 0.13.0

[apetrovYa]

Description

Bump the kube-external-secrets wrapper to the first available 0.13 upstream release: external-secrets Helm chart 0.13.0 (operator v0.13.0).

• Chart.yaml: chart version / appVersion 0.13.0, dependency pinned to 0.13.0
• values.yaml: spec defaults regenerated from helm show values external-secrets/external-secrets --version 0.13.0

Dependencies: After merge and publish, consumers should pin the JetBrains OCI chart to 0.13.0.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Chart Version Update

How Has This Been Tested?

• helm dependency update in charts/kube-external-secrets
• helm template test . --namespace kube-public (renders successfully; subchart spec-0.13.0)
• Parsed values.yaml with PyYAML

Checklist:

• My code follows the contribution guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings.
• I have updated the Chart.yaml with a new version number, following Semantic Versioning.
• I have added an entry to the CHANGELOG.md with the new version number and a summary of my changes.
• I have tested my changes on a live Kubernetes cluster.

Additional Information

Breaking: Chart version moves 0.12.1 → 0.13.0. Terraform / Helm pins must be updated. Review External Secrets release notes for v0.13.0 when upgrading clusters.

This PR includes only charts/kube-external-secrets/; other local changes were left unstaged.

Screenshots

N/A

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