agrega utf-8 para soporte de ñ

src/main/java/pedidos/pedidos/core/authz/conf/JWTAuthenticationFilter.java

@@ -107,7 +107,7 @@ public class JWTAuthenticationFilter extends UsernamePasswordAuthenticationFilte
         public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception)
                 throws IOException, ServletException {
             response.setStatus(401);
-            response.setContentType("application/json");
+            response.setContentType("application/json; charset=utf-8");
             response.getWriter().append(json(exception.getLocalizedMessage()));
 
         }