Update dependency org.junit:junit-bom to v6.0.3

Author: xdev-renovate

build.gradle

@@ -59,7 +59,7 @@ dependencies {
     checkstyle "com.puppycrawl.tools:checkstyle:${checkstyleVersion}"
     pmd "net.sourceforge.pmd:pmd-ant:${pmdVersion}",
             "net.sourceforge.pmd:pmd-java:${pmdVersion}"
-    testImplementation platform('org.junit:junit-bom:6.0.2'),
+    testImplementation platform('org.junit:junit-bom:6.0.3'),
             'org.junit.jupiter:junit-jupiter',
             'org.junit.jupiter:junit-jupiter-engine',
             'org.assertj:assertj-core:3.27.7'