Fix typo in generating-transactions.md (#144)

Author: bravo-kernel

doc/getting-started/generating-transactions.md

@@ -14,7 +14,7 @@ Once the transaction is ready, `const body = builder.build()` can be called to r
 Withdrawals are ADA withdrawn as part of the rewards generated by staking and deposits are refundable ADA locked while resources such as stake certificates or pool registrations exist on the blockchain. They are returned as refunds when these resources are deregistered/retired.
 
 To get to a transaction ready to post on the blockchain, we must create a `Transaction` from that, which consists of the `TransactionBody`, a matching `TransactionWitnessSet` and optionally a `TransactionMetadata`.
-The witnesses and optional metadata must match those provided to the builder. The witnesses must sign the hash of the transaction body returned by `hash_transaction(body)`. In addition to the witnesses for inputs, withdrawals and some certificates require witnesses as well. For example, staking address registration does not require a witness while stake address de-registration requires one. For any questions or doubts about the rules governing fees, deposits, rewards, certificates or which witness types are required refer to the [shelley specs](https://docs.cardano.org/projects/cardano-ledger-specs/en/latest/), specifically the Shelley design specification for general design. The formal specification could be useful for specific details as well. The deisgn spec contains details about which certificates require which type of witnesses in the Certificates and Registrations section.
+The witnesses and optional metadata must match those provided to the builder. The witnesses must sign the hash of the transaction body returned by `hash_transaction(body)`. In addition to the witnesses for inputs, withdrawals and some certificates require witnesses as well. For example, staking address registration does not require a witness while stake address de-registration requires one. For any questions or doubts about the rules governing fees, deposits, rewards, certificates or which witness types are required refer to the [shelley specs](https://docs.cardano.org/projects/cardano-ledger-specs/en/latest/), specifically the Shelley design specification for general design. The formal specification could be useful for specific details as well. The design spec contains details about which certificates require which type of witnesses in the Certificates and Registrations section.
 
 ## Example code