[Java] Upgrade to JUnit 5.9.1.

Author: mjpt777

build.gradle

@@ -45,7 +45,7 @@ def toolchainLauncher = javaToolchains.launcherFor {
 def checkstyleVersion = '9.3'
 def hamcrestVersion = '2.2'
 def mockitoVersion = '4.8.0'
-def junitVersion = '5.9.0'
+def junitVersion = '5.9.1'
 def jmhVersion = '1.35'
 def agronaVersion = '1.17.1'
 def agronaVersionRange = '[1.17.1,2.0[' // allow any release >= 1.17.1 and < 2.0.0