fix(changelog): remove duplicate entry for TfInnerBatchTxn flag and clarify its support in SignTxBlob

Author: banasa44

CHANGELOG.md

@@ -38,8 +38,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Adds `PermissionValue` and `Permission` types for delegated permissions.
 - Adds integration tests for `DelegateSet` submission and delegated `Payment` execution (XLS-75d).
 - Adds `Batch` transaction type.
-- Adds `TfInnerBatchTxn` flag.
-- Adds support for `TfInnerBatchTxn` flag on `SignTxBlob`.
 - Adds `CombineBatchSigners` function to combine the batch signers of a set of transactions into a single transaction.
 - Adds `SignMultiBatch` function to sign a multi-account Batch transaction.
 - Adds `TfInnerBatchTxn` flag.