build(deps): bump com.puppycrawl.tools:checkstyle (#24)

Bumps [com.puppycrawl.tools:checkstyle](https://github.com/checkstyle/checkstyle) from 10.21.1 to 10.21.2.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-10.21.1...checkstyle-10.21.2)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

buildSrc/build.gradle

@@ -8,7 +8,7 @@ repositories {
 
 dependencies {
     implementation "com.github.spotbugs.snom:spotbugs-gradle-plugin:6.0.22"
-    implementation "com.puppycrawl.tools:checkstyle:10.21.1"
+    implementation "com.puppycrawl.tools:checkstyle:10.21.2"
     implementation "io.freefair.gradle:lombok-plugin:8.11"
     implementation "io.github.boolivar.jdoctest.jdoc-spock:io.github.boolivar.jdoctest.jdoc-spock.gradle.plugin:0.11.0"
     implementation "net.sourceforge.pmd:pmd-java:7.9.0"