docs: incorrect link reference in 02_deposit.md (#340)

# What ❔

- Change link for Contract docs in 02_deposit.md.

## Why ❔

- The previous link is 404'ing

## Checklist

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- [x] PR title corresponds to the body of PR (we generate changelog
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- [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`.

docs/advanced/02_deposits.md

@@ -158,7 +158,7 @@ The call to requestL2Transaction, is adding the transaction to the priorityQueue
 
 The zk server (that you started with `zk server` command) is listening on events that are emitted from this contract
 (via eth_watcher module -
-[`loop_iteration` function](https://github.com/matter-labs/zksync-2-dev/blob/main/core/bin/zksync_core/src/eth_watch/mod.rs#L128])
+[`loop_iteration` function](https://github.com/matter-labs/zksync-era/blob/main/core/lib/zksync_core/src/eth_watch/mod.rs#L163)
 ) and adds them to the postgres database (into `transactions` table).
 
 You can actually check it - by running the psql and looking at the contents of the table - then you'll notice that