chore(docs): update docs (#374)

# What ❔

- update docs

## Why ❔

- update docs

## Checklist

<!-- Check your PR fulfills the following items. -->
<!-- For draft PRs check the boxes as you complete them. -->

- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [x] Tests for the changes have been added / updated.
- [x] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk fmt` and `zk lint`.

---------

Co-authored-by: Igor Aleksanov <[email protected]>

docs/advanced/03_withdrawals.md

@@ -120,10 +120,10 @@ BTW - all the transactions are sent to the 0x54e address - which is the `Diamond
 be different on your local node - see previous tutorial for more info) .
 
 And inside, all three methods above belong to
-[Executor.sol](https://github.com/matter-labs/zksync-2-contracts/blob/main/ethereum/contracts/zksync/facets/Executor.sol)
+[Executor.sol](https://github.com/matter-labs/era-contracts/blob/main/ethereum/contracts/zksync/facets/Executor.sol)
 facet and you can look at
-[README](https://github.com/matter-labs/zksync-2-contracts/blob/main/docs/Overview.md#executorfacet) to see the details
-of what each method does.
+[README](https://github.com/matter-labs/era-contracts/blob/main/docs/Overview.md#executorfacet) to see the details of
+what each method does.
 
 The short description is: