Bump the test-dependencies group across 1 directory with 4 updates (#374)

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
-junit = "5.13.3"
-mockito = "5.18.0"
+junit = "6.0.0"
+mockito = "5.20.0"
 testcontainers = "1.21.3"
 kafkaUtils = "1.2.1"
 
@@ -28,7 +28,7 @@ junit-platform-launcher = { group = "org.junit.platform", name = "junit-platform
 junit-jupiter = { group = "org.junit.jupiter", name = "junit-jupiter", version.ref = "junit" }
 junit-pioneer = { group = "org.junit-pioneer", name = "junit-pioneer", version = "2.3.0" }
 junit-systemExit = { group = "com.ginsberg", name = "junit5-system-exit", version = "2.0.2" }
-assertj = { group = "org.assertj", name = "assertj-core", version = "3.27.3" }
+assertj = { group = "org.assertj", name = "assertj-core", version = "3.27.6" }
 mockito-core = { group = "org.mockito", name = "mockito-core", version.ref = "mockito" }
 mockito-junit = { group = "org.mockito", name = "mockito-junit-jupiter", version.ref = "mockito" }
 testcontainers-junit = { group = "org.testcontainers", name = "junit-jupiter", version.ref = "testcontainers" }