Update dependency eslint to v9.21.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint (source)	9.19.0 -> 9.21.0

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Release Notes

eslint/eslint (eslint)

v9.21.0

Compare Source

v9.20.1

Compare Source

v9.20.0

Compare Source

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Configuration

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