Add autogenerated docs for types and methods

docs/api/methods/unpin_chat_message.md

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+# unpinChatMessage
+
+## Description
+
+Use this method to unpin a message in a group, a supergroup, or a channel. The bot must be an administrator in the chat for this to work and must have the ‘can_pin_messages’ admin right in the supergroup or ‘can_edit_messages’ admin right in the channel. Returns True on success.
+
+
+## Arguments
+
+| Name | Type | Description |
+| - | - | - |
+| `chat_id` | `#!python3 Union[int, str]` | Unique identifier for the target chat or username of the target channel (in the format @channelusername) |
+
+
+
+## Response
+
+Type: `#!python3 bool`
+
+Description: Returns True on success.
+
+
+## Usage
+
+
+### As bot method bot
+
+```python3
+result: bool = await bot.unpin_chat_message(...)
+```
+
+### Method as object
+
+Imports:
+
+- `from aiogram.types import UnpinChatMessage`
+- `from aiogram.api.types import UnpinChatMessage`
+- `from aiogram.api.types.unpin_chat_message import UnpinChatMessage`
+
+#### As reply into Webhook
+```python3
+return UnpinChatMessage(...)
+```
+
+#### With specific bot
+```python3
+result: bool = await bot.emit(UnpinChatMessage(...))
+```
+
+#### In handlers with current bot
+```python3
+result: bool = await UnpinChatMessage(...)
+```
+
+
+## Related pages:
+
+- [Official documentation](https://core.telegram.org/bots/api#unpinchatmessage)