rename yarn-copilot chart

[zwzhang0107]

Note on DCO:

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Checklist:

• I have bumped the chart version according to versioning
• I have updated the chart changelog with all the changes that come with this pull request according to changelog.
• Any new values are backwards compatible and/or have sensible default.
• I have signed off all my commits as required by DCO.

Changes are automatically published when merged to master. They are not published on branches.

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