fix(): 修复字符集转换问题

src/main/java/com/muyu/common/nacos/remote/interceptor/NacosNamespaceInterceptor.java

@@ -20,7 +20,7 @@ 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"));
             req.addQuery("namespaceId", namespaceId);  // 添加URL的Query参数
             if (reqNamespaceId == null){
                 log.warn("本次请求nacos的namespaceId未携带, 已添加: [{}]", namespaceId);