Spending UTxOs containing a plutus V3 script fails with Ogmios backend

[nullhashpixel]

Describe the bug

Spending UTxOs containing a plutus V3 script fails with Ogmios backend

https://github.com/Python-Cardano/pycardano/blob/main/pycardano/backend/ogmios_v6.py#L264-L266

To Reproduce
Steps to reproduce the behavior. e.g. A python script.

Logs

  File "/home/.local/lib/python3.8/site-packages/pycardano/txbuilder.py", line 1489, in build_and_sign
    tx_body = self.build(
  File "/home/.local/lib/python3.8/site-packages/pycardano/logging.py", line 37, in wrapper
    raise e
  File "/home/.local/lib/python3.8/site-packages/pycardano/logging.py", line 28, in wrapper
    output = func(obj, *args, **kwargs)
  File "/home/.local/lib/python3.8/site-packages/pycardano/txbuilder.py", line 1220, in build
    for utxo in self.context.utxos(address):
  File "/home/.local/lib/python3.8/site-packages/pycardano/backend/base.py", line 155, in utxos
    return self._utxos(str(address))
  File "/home/.local/lib/python3.8/site-packages/pycardano/backend/ogmios_v6.py", line 230, in _utxos
    utxos = self._utxos_ogmios(OgmiosAddress(address=address))
  File "/home/.local/lib/python3.8/site-packages/pycardano/backend/ogmios_v6.py", line 253, in _utxos_ogmios
    utxos.append(self._utxo_from_ogmios_result(result))
  File "/home/.local/lib/python3.8/site-packages/pycardano/backend/ogmios_v6.py", line 267, in _utxo_from_ogmios_result
    if script["language"] == "plutus:v2":
TypeError: byte indices must be integers or slices, not str

Additional context

fix:

            if script["language"] == "plutus:v3":
                script = PlutusV3Script(bytes.fromhex(script["cbor"]))
            if script["language"] == "plutus:v2":

==>

            if script["language"] == "plutus:v3":
                script = PlutusV3Script(bytes.fromhex(script["cbor"]))
            elif script["language"] == "plutus:v2":

[nielstron]

Thanks, this looks like a valid fix! Proposed a change in #383