Clarify what app_args should be

[avislash]

The current state
The Python snippet of the update section of https://developer.algorand.org/docs/features/asc1/stateful/sdks/#update has the following line

txn = txn = transaction.ApplicationUpdateTxn(sender, params, app_id, \ approval_program, clear_program, app_args)

The app_args parameter is not defined prior to this snippet.

The proposed state
Define what app_args should be in the line right before it is used

For example
app_args = [ ]
txn = txn = transaction.ApplicationUpdateTxn(sender, params, app_id, \ approval_program, clear_program, app_args)
Provide any additional context
Add any other context or screenshots about the proposed update here.

[iskysun96]

@avislash Do you think its necessary to define all the other arguments as well?