Restrict the generated range for TxIx.

Recent ledger changes
(IntersectMBO/cardano-ledger#2530) have
restricted the range for transaction input indices. Since these are
unlikely to be large anyway, restrict the generated range.

cardano-api/gen/Gen/Cardano/Api/Typed.hs

@@ -380,7 +380,7 @@ genTxId :: Gen TxId
 genTxId = TxId <$> genShelleyHash
 
 genTxIndex :: Gen TxIx
-genTxIndex = TxIx <$> Gen.word Range.constantBounded
+genTxIndex = TxIx <$> Gen.word (Range.constantFrom 0 0 65535)
 
 genTxOutValue :: CardanoEra era -> Gen (TxOutValue era)
 genTxOutValue era =