Don't format @NullMarked and @NullUnmarked

Fixes gh-446

Author: philwebb

spring-javaformat/spring-javaformat-formatter-tests/src/test/resources/expected/nullable.txt

@@ -1,6 +1,8 @@
 package example;
 
 import org.jspecify.annotations.Nullable;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.NullUnmarked;
 
 /**
  * Nullable.
@@ -26,4 +28,10 @@ public interface ExampleNullables {
 		return args;
 	}
 
+	@NullMarked
+	void withNullMarked(String str);
+
+	@NullUnmarked
+	void withNullUnmarked(String str);
+
 }

spring-javaformat/spring-javaformat-formatter-tests/src/test/resources/source/nullable.txt

@@ -1,6 +1,8 @@
 package example;
 
 import org.jspecify.annotations.Nullable;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.NullUnmarked;
 
 /**
  * Nullable.
@@ -24,4 +26,10 @@ public interface ExampleNullables {
 		return args;
 	}
 
+	@NullMarked
+	void withNullMarked(String str);
+
+	@NullUnmarked
+	void withNullUnmarked(String str);
+
 }

spring-javaformat/spring-javaformat-formatter/src/main/java/io/spring/javaformat/formatter/jdk17/eclipse/JSpecifyPreparator.java

@@ -42,8 +42,7 @@ public class JSpecifyPreparator implements Preparator {
 
 	private static final String PACKAGE_NAME = "org.jspecify.annotations";
 
-	private static final Set<String> ANNOTATION_NAMES = new HashSet<>(
-			Arrays.asList("NonNull", "Nullable", "NullMarked", "NullUnmarked"));
+	private static final Set<String> ANNOTATION_NAMES = new HashSet<>(Arrays.asList("NonNull", "Nullable"));
 
 	private static final Set<String> FULLY_QUALIFIED_ANNOTATION_NAMES = ANNOTATION_NAMES.stream()
 		.map((annotationName) -> PACKAGE_NAME + "." + annotationName)

spring-javaformat/spring-javaformat-formatter/src/main/java/io/spring/javaformat/formatter/jdk8/eclipse/JSpecifyPreparator.java

@@ -42,8 +42,7 @@ public class JSpecifyPreparator implements Preparator {
 
 	private static final String PACKAGE_NAME = "org.jspecify.annotations";
 
-	private static final Set<String> ANNOTATION_NAMES = new HashSet<>(
-			Arrays.asList("NonNull", "Nullable", "NullMarked", "NullUnmarked"));
+	private static final Set<String> ANNOTATION_NAMES = new HashSet<>(Arrays.asList("NonNull", "Nullable"));
 
 	private static final Set<String> FULLY_QUALIFIED_ANNOTATION_NAMES = ANNOTATION_NAMES.stream()
 		.map((annotationName) -> PACKAGE_NAME + "." + annotationName)