Bump junit from 4.12 to 4.13.1 in /plugins/de.cognicrypt.core

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] <[email protected]>

Author: dependabot[bot]

plugins/de.cognicrypt.core/pom.xml

@@ -129,7 +129,7 @@
 					<dependency>
 						<groupId>junit</groupId>
 						<artifactId>junit</artifactId>
-						<version>4.12</version>
+						<version>4.13.1</version>
 					</dependency>
 				</dependencies>
 			</plugin>
@@ -142,7 +142,7 @@
 					<dependency>
 						<groupId>junit</groupId>
 						<artifactId>junit</artifactId>
-						<version>4.12</version>
+						<version>4.13.1</version>
 					</dependency>
 				</dependencies>
 				<executions>