Update eras/alonzo/impl/src/Cardano/Ledger/Alonzo/Tx.hs

Co-authored-by: teodanciu <teodora.danciu@tweag.io>

Author: Soupstraw

eras/alonzo/impl/src/Cardano/Ledger/Alonzo/Tx.hs

@@ -467,8 +467,5 @@ instance
             <*! From
             <*! From
             <*! Ann From
-            <*! D
-              ( sequence . maybeToStrictMaybe
-                  <$> decodeNullMaybe decCBOR
-              )
+           <*! D (sequence <$> decodeNullStrictMaybe decCBOR)
   {-# INLINE decCBOR #-}