Update dependency @balena/lint to v9

[balena-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@balena/lint	devDependencies	major	^8.2.8 -> ^9.0.0

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Release Notes

balena-io-modules/node-balena-lint (@​balena/lint)

### [`v9.0.1`](https://togithub.com/balena-io-modules/node-balena-lint/blob/HEAD/CHANGELOG.md#v901) [Compare Source](https://togithub.com/balena-io-modules/node-balena-lint/compare/v9.0.0...v9.0.1) #### (2024-09-10) - Fix accidentally commented rules \[Pagan Gazzard] ### [`v9.0.0`](https://togithub.com/balena-io-modules/node-balena-lint/blob/HEAD/CHANGELOG.md#v900) [Compare Source](https://togithub.com/balena-io-modules/node-balena-lint/compare/v8.2.8...v9.0.0) #### (2024-09-10) - Drop the no-op `--tests` flag \[Pagan Gazzard] - Convert warning rules to errors \[Pagan Gazzard] - Update to eslint 9 with flat config \[Pagan Gazzard] - Update minimum supported nodejs to 20.x \[Pagan Gazzard]

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Configuration

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This PR has been generated by Renovate Bot.