解决 nginx报错: [warn] the "listen ... http2" directive is deprecated, use the "http2" directive instead in /usr/local/nginx/conf/vhost/xxx.com.conf:18

在 1.25.1 版本后的 nginx 运行日志中，可能会发现以下警告信息：
[warn] the "listen ... http2" directive is deprecated, use the "http2" directive instead in /usr/local/nginx/conf/vhost/xxx.com.conf:18
原配置：

listen 443 ssl http2;

修改配置为：

`listen 443 ssl;
http2 on;`

重启 nginx 即可。
参考：https://github.com/nginxinc/kubernetes-ingress/issues/4237