chore: update Node.js version in Jenkinsfile to v20.19.3 and adjust PNPM path accordingly

Jenkinsfile

@@ -13,10 +13,11 @@ pipeline {
         // 分支配置
         BUILD_BRANCH = 'main'
 
-        // Node 配置
-        NODE_VERSION = 'v18.20.4'
+        // Node 配置 22.21.1 也是可用的
+        NODE_VERSION = 'v20.19.3'
         NODE_PATH = "/root/.nvm/versions/node/${NODE_VERSION}/bin"
-        PNPM_PATH = '/root/.nvm/versions/node/v18.20.4/bin/pnpm'
+        PNPM_PATH = "/root/.nvm/versions/node/${NODE_VERSION}/bin/pnpm"
+
 
         // Cloudflare 配置
         CLOUDFLARE_PROJECT_NAME = 'tg-live-game-web'