Add Fast4353 in supported table

[pepedocs]

I can confirm that this python module works for the following device.

| Sagemcom F@st 4353 | Belong Gateway | md5 | username: admin, password: "" |

{'reply': {'uid': 0, 'id': 0, 'error': {'code': REDACTED, 'description': 'Ok'}, 'actions': [{'uid': 1, 'id': 0, 'error': {'code': REDACTED, 'description': 'Applied'}, 'callbacks': [{'uid': 1, 'result': {'code': REDACTED, 'description': 'Applied'}, 'xpath': 'Device', 'parameters': {'id': REDACTED, 'nonce': 'REDACTED'}}]}], 'events': []}}
REDACTED FAST4353

[iMicknl]

Are you willing to do a PR?