Update README with not required notifier parameters

Author: tsudmi

README.md

@@ -87,8 +87,8 @@ where `settings.txt` is an environment file with [Settings](#settings).
 | REWARD_ETH_CONTRACT_ADDRESS            | The address of the [Reward ETH Token Contract](https://github.com/stakewise/contracts/blob/master/contracts/tokens/RewardEthToken.sol).                                                                 | Yes      | -       |
 | STAKED_ETH_CONTRACT_ADDRESS            | The address of the  [Staked ETH Token Contract](https://github.com/stakewise/contracts/blob/master/contracts/tokens/StakedEthToken.sol).                                                                | Yes      | -       |
 | ORACLE_PRIVATE_KEY                     | The ETH1 private key of the operator (see `Generating Private Key` below).                                                                                                                              | Yes      | -       |
-| NOTIFIERS_TELEGRAM_TOKEN               | Telegram chat token where notifications about low balance or errors will be sent.                                                                                                                       | Yes      | -       |
-| NOTIFIERS_TELEGRAM_CHAT_ID             | Telegram chat ID where notifications about low balance or errors will be sent.                                                                                                                          | Yes      | -       |
+| NOTIFIERS_TELEGRAM_TOKEN               | Telegram chat token where notifications about low balance or errors will be sent.                                                                                                                       | No       | -       |
+| NOTIFIERS_TELEGRAM_CHAT_ID             | Telegram chat ID where notifications about low balance or errors will be sent.                                                                                                                          | No       | -       |
 | PROCESS_INTERVAL                       | How long to wait before processing again.                                                                                                                                                               | Yes      | -       |
 
 ## Example settings