improve code

Author: krusche

src/main/java/de/tum/in/test/api/internal/sanitization/MultipleFailuresErrorSanitizer.java

@@ -1,7 +1,6 @@
 package de.tum.in.test.api.internal.sanitization;
 
 import java.util.*;
-import java.util.stream.Collectors;
 
 import org.assertj.core.error.AssertJMultipleFailuresError;
 import org.opentest4j.MultipleFailuresError;
@@ -22,8 +21,7 @@ public Throwable sanitize(Throwable t, MessageTransformer messageTransformer) {
 		MultipleFailuresError mfe = (MultipleFailuresError) t;
 		ThrowableInfo info = ThrowableInfo.getEssentialInfosSafeFrom(mfe).sanitize();
 		// list is safe here because of defensive copying in MultipleFailuresError
-		List<Throwable> failures = mfe.getFailures().stream().map(ThrowableSanitizer::sanitize)
-				.collect(Collectors.toUnmodifiableList());
+		List<Throwable> failures = mfe.getFailures().stream().map(ThrowableSanitizer::sanitize).toList();
 		/*
 		 * Message already contains the failures and separating both is more difficult.
 		 * So we just pass the message constructed be the old object, as the new object