move connect_kwargs description to the place it's expected to be

Author: dmig

asyncpg/pool.py

@@ -860,10 +860,6 @@ def create_pool(dsn=None, *,
         the following format:
         ``postgres://user:pass@host:port/database?option=value``.
 
-    :param \*\*connect_kwargs:
-        Keyword arguments for the :func:`~asyncpg.connection.connect`
-        function.
-
     :param Connection connection_class:
         The class to use for connections.  Must be a subclass of
         :class:`~asyncpg.connection.Connection`.
@@ -905,6 +901,10 @@ def create_pool(dsn=None, *,
         An asyncio event loop instance.  If ``None``, the default
         event loop will be used.
 
+    :param \*\*connect_kwargs:
+        Keyword arguments for the :func:`~asyncpg.connection.connect`
+        function.
+
     :return: An instance of :class:`~asyncpg.pool.Pool`.
 
     .. versionchanged:: 0.10.0