Update GetPDFandSave.java (#5494)

* Removed illegal character
 * Changed the name of the public class to match the filename

Author: juanmcloaiza

java/example_code/s3/src/main/java/aws/example/s3/GetPDFandSave.java

@@ -1,6 +1,6 @@
 /* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 SPDX-License-Identifier: Apache-2.0 */
-`
+
 package aws.example.s3;
 
 import java.io.InputStream;
@@ -14,7 +14,7 @@
 import com.amazonaws.services.s3.model.GetObjectRequest;
 import com.amazonaws.services.s3.model.S3Object;
 
-public class App {
+public class GetPDFandSave {
 
     private static final String ACCESS_KEY = "ACCESS_KEY";
     private static final String SECRET_KEY = "SECRET_KEY";