Bump enforcer-api from 3.1.0 to 3.2.1

Bumps [enforcer-api](https://github.com/apache/maven-enforcer) from 3.1.0 to 3.2.1.
- [Release notes](https://github.com/apache/maven-enforcer/releases)
- [Commits](apache/maven-enforcer@enforcer-3.1.0...enforcer-3.2.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.enforcer:enforcer-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -60,7 +60,7 @@
 
   <properties>
     <!-- override from parent pom, here we need more control -->
-    <maven-enforcer-plugin.version>3.1.0</maven-enforcer-plugin.version>
+    <maven-enforcer-plugin.version>3.2.1</maven-enforcer-plugin.version>
     <!-- we need dot less properties for .vm -->
     <enforcerPluginVersion>${maven-enforcer-plugin.version}</enforcerPluginVersion>
     <maven.version>3.2.5</maven.version>