4844: nit

Co-authored-by: Paweł Bylica <chfast@gmail.com>

EIPS/eip-4844.md

@@ -181,7 +181,7 @@ The `ethereum/consensus-specs` repository defines the following beacon-node chan
 
 ### Opcode to get versioned hashes
 
-We add an opcode `BLOBHASH` (with byte value `HASH_OPCODE_BYTE`) which reads `index` from the top of the stack
+We add an instruction `BLOBHASH` (with opcode `HASH_OPCODE_BYTE`) which reads `index` from the top of the stack
 as big-endian `uint256`, and replaces it on the stack with `tx.blob_versioned_hashes[index]`
 if `index < len(tx.blob_versioned_hashes)`, and otherwise with a zeroed `bytes32` value.
 The opcode has a gas cost of `HASH_OPCODE_GAS`.