rename SPC_RETRY_TIME to SPC_DOWNLOAD_RETRIES to clear up what it's doing

sleep 5 seconds between retries

src/SPC/store/source/PhpSource.php

@@ -34,7 +34,7 @@ class PhpSource extends CustomSourceBase
         // 查找最新的小版本号
         $info = json_decode(Downloader::curlExec(
             url: "https://www.php.net/releases/index.php?json&version={$major_version}",
-            retry: intval(getenv('SPC_RETRY_TIME') ? getenv('SPC_RETRY_TIME') : 0)
+            retries: intval(getenv('SPC_DOWNLOAD_RETRIES') ?: 0)
         ), true);
         if (!isset($info['version'])) {
             throw new DownloaderException("Version {$major_version} not found.");