优化代码，去除编译警告，修复拼写错误

src/Http/HttpCookieManager.h

@@ -111,10 +111,10 @@ private:
 /**
  * cookie随机字符串生成器
  */
-class RandStrGeneator {
+class RandStrGenerator {
 public:
-    RandStrGeneator() = default;
-    ~RandStrGeneator() = default;
+    RandStrGenerator() = default;
+    ~RandStrGenerator() = default;
 
     /**
      * 获取不碰撞的随机字符串
@@ -244,7 +244,7 @@ private:
         _map_uid_to_cookie;
     std::recursive_mutex _mtx_cookie;
     toolkit::Timer::Ptr _timer;
-    RandStrGeneator _geneator;
+    RandStrGenerator _generator;
 };
 
 } // namespace mediakit