Improve helm files detection

[f1ames]

This PR improves helm files detection.

Changes

• None.

Fixes

• As above.

Checklist

• [x] tested locally
• [ ] added new dependencies
• [ ] updated the docs
• [ ] added a test

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 0f8d7c56d561c197523bfda65785d29830b298b4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | --------------- | ----- | | @monokle/parser | Patch |

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