Update devDependency eslint-plugin-vue to ^9.21.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-plugin-vue (source)	^9.21.0 -> ^9.21.1

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Release Notes

vuejs/eslint-plugin-vue (eslint-plugin-vue)

### [`v9.21.1`](https://togithub.com/vuejs/eslint-plugin-vue/compare/v9.21.0...v9.21.1) [Compare Source](https://togithub.com/vuejs/eslint-plugin-vue/compare/v9.21.0...v9.21.1)

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Configuration

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