Use try with close

See gh-33987

spring-boot-project/spring-boot-tools/spring-boot-configuration-metadata/src/main/java/org/springframework/boot/configurationmetadata/JsonReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -196,7 +196,7 @@ class JsonReader {
 	}
 
 	private JSONObject readJson(InputStream in, Charset charset) throws Exception {
-		try {
+		try (in) {
 			StringBuilder out = new StringBuilder();
 			InputStreamReader reader = new InputStreamReader(in, charset);
 			char[] buffer = new char[BUFFER_SIZE];
@@ -206,9 +206,6 @@ class JsonReader {
 			}
 			return new JSONObject(out.toString());
 		}
-		finally {
-			in.close();
-		}
 	}
 
 }