Merge pull request #8071 from ethosdev/patch-2

Fix DIFFICULTY opcode with PREVRANDAO

Author: jmcook1186

src/content/developers/docs/evm/opcodes/index.md

@@ -67,7 +67,7 @@ For operations with dynamic gas costs, see [gas.md](https://github.com/wolflo/ev
 |  41   | COINBASE       |                                                2                                                | `.`                                                                                       | `block.coinbase`                |                                                                               | address of miner of current block                                                                                                                     |
 |  42   | TIMESTAMP      |                                                2                                                | `.`                                                                                       | `block.timestamp`               |                                                                               | timestamp of current block                                                                                                                            |
 |  43   | NUMBER         |                                                2                                                | `.`                                                                                       | `block.number`                  |                                                                               | number of current block                                                                                                                               |
-|  44   | DIFFICULTY     |                                                2                                                | `.`                                                                                       | `block.difficulty`              |                                                                               | difficulty of current block                                                                                                                           |
+|  44   | PREVRANDAO     |                                                2                                                | `.`                                                                                       | `randomness beacon`             |                                                                               | randomness beacon                                                                                                                                     |
 |  45   | GASLIMIT       |                                                2                                                | `.`                                                                                       | `block.gaslimit`                |                                                                               | gas limit of current block                                                                                                                            |
 |  46   | CHAINID        |                                                2                                                | `.`                                                                                       | `chain_id`                      |                                                                               | push current [chain id](https://eips.ethereum.org/EIPS/eip-155) onto stack                                                                            |
 |  47   | SELFBALANCE    |                                                5                                                | `.`                                                                                       | `address(this).balance`         |                                                                               | balance of executing contract, in wei                                                                                                                 |