MINOR: Bump com.puppycrawl.tools:checkstyle from 10.20.1 to 10.21.1 (#543)

Bumps
[com.puppycrawl.tools:checkstyle](https://github.com/checkstyle/checkstyle)
from 10.20.1 to 10.21.1.

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

Author: dependabot[bot]

pom.xml

@@ -105,7 +105,7 @@ under the License.
     <dep.avro.version>1.12.0</dep.avro.version>
     <arrow.vector.classifier></arrow.vector.classifier>
     <forkCount>2</forkCount>
-    <checkstyle.version>10.20.1</checkstyle.version>
+    <checkstyle.version>10.21.1</checkstyle.version>
     <checkstyle.failOnViolation>true</checkstyle.failOnViolation>
     <error_prone_core.version>2.31.0</error_prone_core.version>
     <mockito.core.version>5.15.2</mockito.core.version>