Update test dependencies

* Update JUnit to 6.0.2.
* Update Mockito to 5.21.0.
* Update ApprovalTests to 26.4.0.

Merged-by: Stefan Walter <stefan.walter@iml.fraunhofer.de>

Author: swltr

gradle/libs.versions.toml

@@ -22,12 +22,12 @@ semver4j = "6.0.0"
 slf4j = "2.0.17"
 swagger-ui = "5.30.3"
 # Test dependency versions
-approvaltests = "25.10.0"
+approvaltests = "26.4.0"
 assertj = "3.27.6"
 hamcrest = "3.0"
-junit = "6.0.1"
-junit-platform-launcher = "6.0.1"
-mockito = "5.20.0"
+junit = "6.0.2"
+junit-platform-launcher = "6.0.2"
+mockito = "5.21.0"
 # Plugin versions
 asciidoctor = "4.0.5"
 dependency-license-report = "3.0.1"

opentcs-documentation/src/docs/release-notes/changelog.adoc

@@ -21,6 +21,10 @@ This change log lists the most relevant changes for past releases in reverse chr
 * Bugs fixed:
 ** Avoid `NullPointerException` when trying to assign a vehicle to a reserved transport orders that has been removed in the meantime.
 ** Actually add given properties to newly-created plant models' visual layouts.
+* Changes affecting developers:
+** Update JUnit to 6.0.2.
+** Update Mockito to 5.21.0.
+** Update ApprovalTests to 26.4.0.
 
 == Version 7.1 (2025-12-09)