修复字符集转换异常的问题

src/main/java/com/bwie/nacos/remote/interceptor/NacosNamespaceInterceptor.java

@@ -22,7 +22,7 @@ public class NacosNamespaceInterceptor<T> implements Interceptor<T> {
     @Override
     public boolean beforeExecute(ForestRequest req) {
         if (StringUtils.isNotEmpty(namespaceId)){
-            String reqNamespaceId = Convert.str(req.getQuery("namespaceId"), "");
+            String reqNamespaceId = Convert.utf8Str(req.getQuery("namespaceId"));
             if (reqNamespaceId==null){
                 log.warn("本次请求nccos的namespaceId未携带,已添加[{}]",namespaceId);
                 req.addQuery("namespaceId",namespaceId);