Bump sortpom-maven-plugin from 2.12.0 to 2.13.1

Bumps [sortpom-maven-plugin](https://github.com/Ekryd/sortpom) from 2.12.0 to 2.13.1.
- [Release notes](https://github.com/Ekryd/sortpom/releases)
- [Commits](Ekryd/sortpom@sortpom-parent-2.12.0...sortpom-parent-2.13.1)

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

pom.xml

@@ -344,7 +344,7 @@
         <plugin>
           <groupId>com.github.ekryd.sortpom</groupId>
           <artifactId>sortpom-maven-plugin</artifactId>
-          <version>2.12.0</version>
+          <version>2.13.1</version>
         </plugin>
         <plugin>
           <groupId>com.github.github</groupId>