Bot API 6.3 (#1063)

* Added API changes

* Added changelog

* Oops. Move changelog

* Update tests

* Remove experimental

* Added message content type

* Update message aliases

* Update changes

* Update texts

* Bump version

* Remove versionadded badge

docs/api/methods/create_forum_topic.rst

@@ -0,0 +1,44 @@
+################
+createForumTopic
+################
+
+Returns: :obj:`ForumTopic`
+
+.. automodule:: aiogram.methods.create_forum_topic
+    :members:
+    :member-order: bysource
+    :undoc-members: True
+
+
+Usage
+=====
+
+As bot method
+-------------
+
+.. code-block::
+
+    result: ForumTopic = await bot.create_forum_topic(...)
+
+
+Method as object
+----------------
+
+Imports:
+
+- :code:`from aiogram.methods.create_forum_topic import CreateForumTopic`
+- alias: :code:`from aiogram.methods import CreateForumTopic`
+
+With specific bot
+~~~~~~~~~~~~~~~~~
+
+.. code-block:: python
+
+    result: ForumTopic = await bot(CreateForumTopic(...))
+
+As reply into Webhook in handler
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: python
+
+    return CreateForumTopic(...)