feat: upgrade charts to chatwoot v4.15.1

[vishnu-narayanan]

Description

• Update charts to chatwoot v4.15.1
• Please read the migration guide before upgrading to v4 from 3.x.x
• https://chwt.app/v4/migration
• https://github.com/chatwoot/chatwoot/releases/tag/v4.15.1

Type of change

• Chore (Update Chatwoot version)

How Has This Been Tested?

• Tested installation against a fresh k8s cluster
• Tested upgrade against a k8s cluster running Chatwoot v4.14.0

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code

Fixes https://linear.app/chatwoot/issue/CW-7545

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Default the chart to v4.15.1

Chatwoot v4.15.1 was already released on 2026-06-17 and its changelog says it reverts the unread-count changes due to performance issues; defaulting new Helm installs/upgrades to v4.15.0 ships the known-regressed build from the v4.15.0 line. Please point the default image tag and appVersion at the patch release instead.

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[vishnu-narayanan]

Good catch. Retargeted the release to v4.15.1 (appVersion, image tag, README) in the follow-up commit. Chart version stays at 2.0.24.