Bump junit from 4.12 to 4.13.1 in /activation

Bumps [junit](https://github.com/junit-team/junit4) from 4.12 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.12.md)
- [Commits](junit-team/junit4@r4.12...r4.13.1)

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

activation/pom.xml

@@ -120,7 +120,7 @@
 	<dependency>
 	    <groupId>junit</groupId>
 	    <artifactId>junit</artifactId>
-	    <version>4.12</version>
+	    <version>4.13.1</version>
 	    <scope>test</scope>
 	    <optional>true</optional>
 	</dependency>