Bump maven-checkstyle-plugin from 3.1.1 to 3.1.2

Bumps [maven-checkstyle-plugin](https://github.com/apache/maven-checkstyle-plugin) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/apache/maven-checkstyle-plugin/releases)
- [Commits](https://github.com/apache/maven-checkstyle-plugin/compare/maven-checkstyle-plugin-3.1.1...maven-checkstyle-plugin-3.1.2)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index f64d45c..a13b203 100644
--- a/pom.xml
+++ b/pom.xml
@@ -238,7 +238,7 @@
       </plugin>
       <plugin>
         <artifactId>maven-checkstyle-plugin</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
         <configuration>
           <configLocation>org/apache/commons/functor/checkstyle.xml</configLocation>
           <headerLocation>org/apache/commons/functor/license-header.txt</headerLocation>