Update cardano-api vNext: Expand BalancedTxBody to include TxBodyContent

Author: Jimbo4350

cardano-api/ChangeLog.md

@@ -8,6 +8,8 @@
 
 - Expose convenience functions `executeQueryCardanoMode`, `determineEra`, `constructBalancedTx` and `queryStateForBalancedTx` ([PR 4446](https://github.com/input-output-hk/cardano-node/pull/4446))
 
+- Expand BalancedTxBody to include TxBodyContent ([PR 4491](https://github.com/input-output-hk/cardano-node/pull/4491))
+
 ### Bugs
 
 - Allow reading text envelopes from pipes ([PR 4384](https://github.com/input-output-hk/cardano-node/pull/4384))