Bump junit in /gem-maven-plugin/src/it/include-rubygems-in-resources

Bumps [junit](https://github.com/junit-team/junit4) from 4.8.2 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.13.1.md)
- [Commits](junit-team/junit4@r4.8.2...r4.13.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gem-maven-plugin/src/it/include-rubygems-in-resources/pom.xml

@@ -25,7 +25,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.8.2</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>