Replace non-ASCII quote with ' in javadoc

Author: carlzogh

aws-lambda-java-events/src/main/java/com/amazonaws/services/lambda/runtime/events/CognitoUserPoolVerifyAuthChallengeResponseEvent.java

@@ -61,7 +61,7 @@ public static class Request extends CognitoUserPoolEvent.Request {
          */
         private Map<String, String> clientMetadata;
         /**
-         * This parameter comes from the Create Auth Challenge trigger, and is compared against a user’s challengeAnswer to determine whether the user passed the challenge.
+         * This parameter comes from the Create Auth Challenge trigger, and is compared against a user's challengeAnswer to determine whether the user passed the challenge.
          */
         private Map<String, String> privateChallengeParameters;
         /**