Bump maven-scm-publish-plugin from 3.1.0 to 3.2.1 (#311)

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

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-scm-publish-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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pom.xml

@@ -189,7 +189,7 @@
                 </plugin>
                 <plugin>
                     <artifactId>maven-scm-publish-plugin</artifactId>
-                    <version>3.1.0</version>
+                    <version>3.2.1</version>
                 </plugin>
             </plugins>
         </pluginManagement>