Fix missing required fields in AccessListEntry

According to https://eips.ethereum.org/EIPS/eip-2930
> For the transaction to be valid, accessList must be of type [[{20 bytes}, [{32 bytes}...]]...]

Author: pgherveou

src/schemas/transaction.yaml

@@ -64,6 +64,9 @@ AccessListEntry:
   title: Access list entry
   type: object
   additionalProperties: false
+  required: 
+    - address
+    - storageKeys
   properties:
     address:
       $ref: '#/components/schemas/address'