Update most non-major Gradle dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
checkstyle (source)	10.18.1 -> 10.18.2
org.simplejavamail:simple-java-mail (source)	8.11.3 -> 8.12.0
org.apache.logging.log4j:log4j-to-slf4j (source)	2.24.0 -> 2.24.1
org.apache.logging.log4j:log4j-api (source)	2.24.0 -> 2.24.1

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Release Notes

checkstyle/checkstyle (checkstyle)

### [`v10.18.2`](https://redirect.github.com/checkstyle/checkstyle/compare/checkstyle-10.18.1...checkstyle-10.18.2)

bbottema/simple-java-mail (org.simplejavamail:simple-java-mail)

### [`v8.12.0`](https://redirect.github.com/bbottema/simple-java-mail/releases/tag/8.12.0) [Compare Source](https://redirect.github.com/bbottema/simple-java-mail/compare/8.11.3...8.12.0) - [#​550](https://redirect.github.com/bbottema/simple-java-mail/issues/550): \[bug] Environment variables are not being loaded properly - [#​538](https://redirect.github.com/bbottema/simple-java-mail/issues/538): \[bug] System properties are only read if configuration file exists in class path - [#​546](https://redirect.github.com/bbottema/simple-java-mail/pull/546): \[Enhancement] Trim whitespace in encoder values for Content-Encoding

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