chore: format nested bullets (#762)

Co-authored-by: Dennis <[email protected]>

docs/dev/how-to/send-message-l2-l1.md

@@ -256,7 +256,10 @@ function proveL2MessageInclusion(
 
 - `_blockNumber`: L1 batch number in which the L2 block was included; retrievable using the `getBlock` method.
 - `_index`: Index of the L2 log in the block; returned as `id` by the [`zks_getL2ToL1LogProof`](../../api/api.md#zks-getl2tol1logproof) method.
-  `_message`: Parameter holding the message data. It should be an object containing: - `sender`: Address that sent the message from L2. - `data`: Message sent in bytes. - `txNumberInBlock`: Index of the transaction in the L2 block; returned as `transactionIndex` with [`getTransactionReceipt`](https://docs.ethers.org/v5/single-page/#/v5/api/providers/provider/-%23-Provider-getTransactionReceipt) on an Ethers `Provider` object.
+- `_message`: Parameter holding the message data. It should be an object containing: 
+  - `sender`: Address that sent the message from L2. 
+  - `data`: Message sent in bytes. 
+  - `txNumberInBlock`: Index of the transaction in the L2 block; returned as `transactionIndex` with [`getTransactionReceipt`](https://docs.ethers.org/v5/single-page/#/v5/api/providers/provider/-%23-Provider-getTransactionReceipt) on an Ethers `Provider` object.
 - `_proof`: Merkle proof of the message inclusion; retrieved by observing Ethereum or using the `zks_getL2ToL1LogProof` method of the zksync-web3 API.
   :::