chore(deps): update dependency rubocop-performance to '~> 1.21.0' (main)

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rubocop-performance (source, changelog)	'~> 1.20.0' -> '~> 1.21.0'

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Release Notes

rubocop/rubocop-performance (rubocop-performance)

### [`v1.21.0`](https://togithub.com/rubocop/rubocop-performance/blob/HEAD/CHANGELOG.md#1210-2024-03-30) [Compare Source](https://togithub.com/rubocop/rubocop-performance/compare/v1.20.2...v1.21.0) ##### New features - [#​446](https://togithub.com/rubocop/rubocop-performance/pull/446): Support Prism as a Ruby parser (experimental). (\[[@​koic](https://togithub.com/koic)]\[]) ##### Bug fixes - [#​437](https://togithub.com/rubocop/rubocop-performance/issues/437): Fix a false positive for `Performance/ChainArrayAllocation` when using `select` with block argument after `select`. (\[[@​koic](https://togithub.com/koic)]\[]) - [#​448](https://togithub.com/rubocop/rubocop-performance/issues/448): Fix a false positive for `Performance/RedundantBlockCall` when using `block.call` with block argument. (\[[@​koic](https://togithub.com/koic)]\[]) ##### Changes - [#​240](https://togithub.com/rubocop/rubocop-performance/issues/240): Disable `Performance/Casecmp` cop by default. (\[[@​parkerfinch](https://togithub.com/parkerfinch)]\[])

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