Update dependency com.puppycrawl.tools:checkstyle to v10.20.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.puppycrawl.tools:checkstyle (source)	10.19.0 -> 10.20.0

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Release Notes

checkstyle/checkstyle (com.puppycrawl.tools:checkstyle)

### [`v10.20.0`](https://redirect.github.com/checkstyle/checkstyle/compare/checkstyle-10.19.0...checkstyle-10.20.0) [Compare Source](https://redirect.github.com/checkstyle/checkstyle/compare/checkstyle-10.19.0...checkstyle-10.20.0)

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Configuration

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🚦 Automerge: Enabled.

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