[DOC] Incomplete docstring in `LSTMFCNNetwork`

#### Describe the issue linked to the documentation Docstring of `LSTMFCNNetwork` class doesn't mention the list of parameters of the class. https://github.com/sktime/sktime/blob/f131a1c132c0ea663ad958ca7901eaf36cd07cc5/sktime/networks/lstmfcn.py#L6-L23 #### Suggest a potential alternative/fix The required list of parameters is mentioned as a comment in the `__init__` function of the class. Remove it from `__init__` function and add it to the docstring. Check for such docstring discrepancies in all the classes defined in : - [sktime/sktime/networks/](https://github.com/sktime/sktime/tree/f131a1c132c0ea663ad958ca7901eaf36cd07cc5/sktime/networks) - [sktime/sktime/classification/deep_learning/](https://github.com/sktime/sktime/tree/f131a1c132c0ea663ad958ca7901eaf36cd07cc5/sktime/classification/deep_learning) - [sktime/sktime/regression/deep_learning/](https://github.com/sktime/sktime/tree/f131a1c132c0ea663ad958ca7901eaf36cd07cc5/sktime/regression/deep_learning)