2.6.1

• Don't specify node version (by @iamkun in #14546)
• Fix doc directory in deloy-faas.sh (by @ziyoung in #14553)
• Fix date style issue in changelog for 2.6.0 (by @island205 in #14547)
• Fix doc typo (by @wack6 in #14552)

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• 不再指定 node 版本 (by @iamkun in #14546)
• 调整 deloy-faas.sh 中的文档目录 (by @ziyoung in #14553)
• 调整 2.6.0 中 changelog 日期样式 (by @island205 in #14547)
• 修复拼写错误 (by @wack6 in #14552)