chore: redo typo PR by satyambnsal (#5929)

Thanks satyambnsal for
#5769. Our policy is
to redo typo changes to dissuade metric farming. This is an automated
script.

Co-authored-by: AztecBot <[email protected]>

docs/docs/developers/tutorials/writing_token_contract.md

@@ -176,7 +176,7 @@ Transactions are initiated in the private context, then move to the L2 public co
 
 Step 1. Private Execution
 
-Users provide inputs and execute locally on a their device for privacy reasons. Outputs of the private execution are commitment and nullifier updates, a proof of correct execution and any return data to pass to the public execution context.
+Users provide inputs and execute locally on their device for privacy reasons. Outputs of the private execution are commitment and nullifier updates, a proof of correct execution and any return data to pass to the public execution context.
 
 Step 2. Public Execution