To decode in UTF-8

src/main/java/com/github/JanLoebel/jsonschemavalidation/advice/JsonValidationRequestBodyControllerAdvice.java

@@ -85,7 +85,7 @@ private String toString(HttpInputMessage inputMessage) throws IOException {
     }
 
     private InputStream fromString(String body) {
-        return new ByteArrayInputStream(body.getBytes());
+        return new ByteArrayInputStream(body.getBytes(StandardCharsets.UTF_8));
     }
 
     private HttpInputMessage buildHttpInputMessage(String body, HttpHeaders httpHeaders) {