修复 PHP 8.5 中 curl_close() 弃用警告 (#1924)

* Initial plan

* 移除 curl_close() 调用以修复 PHP 8.5 弃用警告

Co-authored-by: joyqi <59437+joyqi@users.noreply.github.com>

* 使用 PHP 版本检查兼容 PHP 7.4 的 curl_close 处理

Co-authored-by: joyqi <59437+joyqi@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: joyqi <59437+joyqi@users.noreply.github.com>

var/Typecho/Http/Client.php

@@ -337,13 +337,21 @@ class Client
         $response = curl_exec($ch);
         if (false === $response) {
             $error = curl_error($ch);
-            curl_close($ch);
+            if (PHP_VERSION_ID >= 80000) {
+                unset($ch);
+            } else {
+                curl_close($ch);
+            }
             throw new Exception($error, 500);
         }
 
         $this->responseStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
         $this->responseBody = $response;
-        curl_close($ch);
+        if (PHP_VERSION_ID >= 80000) {
+            unset($ch);
+        } else {
+            curl_close($ch);
+        }
     }
 
     /**