Storage: Mislead BucketNotification.reload method's return type in doc-string

[HemangChothani]

BucketNotification's reload method document specify return type = bool

python-storage/google/cloud/storage/notification.py

Lines 329 to 331 in 98684b8

	:rtype: bool
	:returns: True, if the notification exists, else False.
	:raises ValueError: if the notification has no ID.

But, it returns nothing.

python-storage/google/cloud/storage/notification.py

Lines 342 to 345 in 98684b8

	response = client._connection.api_request(
	method="GET", path=self.path, query_params=query_params, timeout=timeout
	)
	self._set_properties(response)