Renamed method parameter and fixed linter issue

[popenta]

Renamed a parameter:
From:

def decode_event(self, event_name: str, topics: List[bytes], data_items: List[bytes]) -> SimpleNamespace:

To:

def decode_event(self, event_name: str, topics: List[bytes], additional_data: List[bytes]) -> SimpleNamespace:

[github-actions]

Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
multiversx_sdk/abi
abi.py					271
multiversx_sdk/core/transactions_factories
transfer_transactions_factory.py
multiversx_sdk/core/transactions_outcome_parsers
transaction_events_parser.py
multiversx_sdk/network_providers
transaction_decoder.py					15, 19
Project Total

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