chore: Set Launcher's compliance level to 17 for some default-pretty-printer tests (#6241)

Author: rishivijayv

src/test/java/spoon/reflect/visitor/DefaultJavaPrettyPrinterTest.java

@@ -121,6 +121,7 @@ public void testParenOptimizationCorrectlyPrintsParenthesesForStatements(String
 
     private static Launcher createLauncherWithOptimizeParenthesesPrinter() {
         Launcher launcher = new Launcher();
+        launcher.getEnvironment().setComplianceLevel(17);
         launcher.getEnvironment().setPrettyPrinterCreator(() -> {
             DefaultJavaPrettyPrinter printer = new DefaultJavaPrettyPrinter(launcher.getEnvironment());
             printer.setMinimizeRoundBrackets(true);