[Java] Bump JUnit to 6.0.0.

Author: vyazelenko

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ httpcore = "4.4.14"
 jqwik = "1.9.3"
 jmh = "1.37"
 json = "20250517"
-junit = "5.13.4"
+junit = "6.0.0"
 mockito = "5.20.0"
 plexus = "3.3.0"
 shadow = "9.2.2"

sbe-tool/src/test/java/uk/co/real_logic/sbe/generation/java/QualifiedYieldTest.java

@@ -20,8 +20,6 @@
 import org.agrona.generation.CompilerUtil;
 import org.agrona.generation.StringWriterOutputManager;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.condition.EnabledForJreRange;
-import org.junit.jupiter.api.condition.JRE;
 import uk.co.real_logic.sbe.Tests;
 import uk.co.real_logic.sbe.ir.Ir;
 import uk.co.real_logic.sbe.xml.IrGenerator;
@@ -44,7 +42,6 @@ public class QualifiedYieldTest
     private final StringWriterOutputManager outputManager = new StringWriterOutputManager();
 
     @Test
-    @EnabledForJreRange(min = JRE.JAVA_17)
     void shouldGenerateValidJava() throws Exception
     {
         try (InputStream in = Tests.getLocalResource("issue910.xml"))