safe-core-sdk README outdated

[antomor]

The README of the safe-core-sdk package is outdated, and it doesn't include the changes related to the introduction of the TransactionResult interface.
All the examples with execute or approveTransactionHash call the wait method on the TransactionResult interface, but it doesn't include such method.

Example

Wrong version:

const approveTxResponse = await safeSdk2.approveTransactionHash(txHash)
await approveTxResponse.wait()

Fixed version:

const executeTxResponse = await safeSdk3.executeTransaction(safeTransaction)
await executeTxResponse.transactionResponse?.wait()

[germartinez]

Good catch @antomor. Thank you very much!