Fix _bleio doc comments

shared-bindings/_bleio/Characteristic.c

@@ -24,8 +24,9 @@
 //|         as part of remote Services."""
 //|         ...
 
+//|     @classmethod
 //|     def add_to_service(
-//|         self,
+//|         cls,
 //|         service: Service,
 //|         uuid: UUID,
 //|         *,

shared-bindings/_bleio/CharacteristicBuffer.c

@@ -25,15 +25,15 @@ static void raise_error_if_not_connected(bleio_characteristic_buffer_obj_t *self
 //|     """Accumulates a Characteristic's incoming values in a FIFO buffer."""
 //|
 //|     def __init__(
-//|         self, characteristic: Characteristic, *, timeout: int = 1, buffer_size: int = 64
+//|         self, characteristic: Characteristic, *, timeout: float = 1.0, buffer_size: int = 64
 //|     ) -> None:
 //|         """Monitor the given Characteristic. Each time a new value is written to the Characteristic
 //|         add the newly-written bytes to a FIFO buffer.
 //|
 //|         :param Characteristic characteristic: The Characteristic to monitor.
 //|           It may be a local Characteristic provided by a Peripheral Service, or a remote Characteristic
 //|           in a remote Service that a Central has connected to.
-//|         :param int timeout:  the timeout in seconds to wait for the first character and between subsequent characters.
+//|         :param float timeout:  the timeout in seconds to wait for the first character and between subsequent characters.
 //|         :param int buffer_size: Size of ring buffer that stores incoming data coming from client.
 //|           Must be >= 1."""
 //|         ...