Update document title to "Built-in Node Docs" (#558)

* Update custom-nodes/help_page.mdx

* Update custom-nodes/help_page.mdx

* Update zh-CN/custom-nodes/help_page.mdx

* Update custom-nodes/help_page.mdx

* Update zh-CN/custom-nodes/help_page.mdx

* Update custom-nodes/help_page.mdx

* Update help page to reference custom nodes

Replaced references to '内置节点' (built-in nodes) with '自定义节点' (custom nodes) to clarify documentation applies to custom node development. This improves accuracy for users creating help docs for their own nodes.

---------

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>
Co-authored-by: ComfyUI Wiki <[email protected]>

Author: mintlify[bot]

custom-nodes/help_page.mdx

@@ -1,5 +1,6 @@
 ---
-title: "Help Page"
+title: "Add node docs for your ComfyUI custom node"
+sidebarTitle: "Node docs"
 description: "How to create rich documentation for your custom nodes"
 ---
 
@@ -12,7 +13,7 @@ No additional node documentation needs to be added, and you can refer to the rel
 
 ## Setup
 
-To add documentation for your nodes or multi-language support documentation:
+To add documentation for your custom nodes or multi-language support documentation:
 
 1. Create a `docs` folder inside your `WEB_DIRECTORY`
 2. Add markdown files named after your nodes (the names of your nodes are the dictionary keys in the `NODE_CLASS_MAPPINGS` dictionary used to register the nodes):

zh-CN/custom-nodes/help_page.mdx

@@ -1,6 +1,7 @@
 ---
-title: "帮助页面"
-description: "如何为自定义节点创建帮助文档"
+title: "为你的 ComfyUI 自定义节点添加节点文档"
+sidebarTitle: "节点文档"
+description: "如何为内置节点创建帮助文档"
 ---
 
 ## 使用 Markdown 创建节点文档
@@ -11,7 +12,7 @@ description: "如何为自定义节点创建帮助文档"
 
 ## 设置
 
-为你的节点添加节点文档或多语言支持的节点文档：
+为你的自定义节点添加节点文档或多语言支持的节点文档：
 
 1. 在你的 `WEB_DIRECTORY` 中创建 `docs` 文件夹
 2. 添加以节点名称命名的 Markdown 文件（您的节点名称是用于注册节点的 `NODE_CLASS_MAPPINGS` 字典中的字典键）：