fix 修复hscasnEach变量名导致的作用域问题 (#722)

Co-authored-by: wangruanqiang <wangruanqiang@youzhibo.cn>

Author: aLoNeIT

src/Redis/RedisHandler.php

@@ -478,9 +478,9 @@ public function hscanEach(string $key, ?string $pattern = null, int $count = 0)
         {
             if ($result)
             {
-                foreach ($result as $key => $value)
+                foreach ($result as $field => $value)
                 {
-                    yield $key => $value;
+                    yield $field => $value;
                 }
             }
         }