Update .env.example for katana (kkrt-labs#614)

Time spent on this PR: 0.01

## Pull request type

Please check the type of change your PR introduces:

- [ ] Bugfix
- [ ] Feature
- [ ] Code style update (formatting, renaming)
- [ ] Refactoring (no functional changes, no api changes)
- [ ] Build related changes
- [x] Documentation content changes
- [ ] Other (please describe):

## What is the current behavior?

The default account for katana in the `.env.example` doesn't exist
anymore

## What is the new behavior?

Updated values

## Other information

While trying to deploy kakarot on katana, I was able to deploy a
`Counter` but not an ERC20, still facing the events issue. Not sure why
it would work for Counter and not ERC20 though. Just added in the
printed error the receipt's events.

.env.example

@@ -21,8 +21,8 @@ SHARINGAN_PRIVATE_KEY=
 DEVNET_ACCOUNT_ADDRESS=0x7e00d496e324876bbc8531f2d9a82bf154d1a04a50218ee74cdd372f75a551a
 DEVNET_PRIVATE_KEY=0xe3e70682c2094cac629f6fbed82c07cd
 
-KATANA_ACCOUNT_ADDRESS=0x06f62894bfd81d2e396ce266b2ad0f21e0668d604e5bb1077337b6d570a54aea
-KATANA_PRIVATE_KEY=0x07230b49615d175307d580c33d6fda61fc7b9aec91df0f5c1a5ebe3b8cbfee02
+KATANA_ACCOUNT_ADDRESS=0x03ee9e18edc71a6df30ac3aca2e0b02a198fbce19b7480a63a0d71cbd76652e0
+KATANA_PRIVATE_KEY=0x0300001800000000300000180000000000030000000000003006001800006600
 
 ACCOUNT_ADDRESS=
 PRIVATE_KEY=

scripts/utils/kakarot.py

@@ -100,7 +100,9 @@ async def deploy(
         if event.from_address == int(get_deployments()["kakarot"]["address"], 16)
     ]
     if len(deploy_event) != 1:
-        raise ValueError("Cannot locate evm contract address event")
+        raise ValueError(
+            f"Cannot locate evm contract address event, receipt events:\n{receipt.events}"
+        )
     evm_address, _ = deploy_event[0].data
     contract.address = Web3.to_checksum_address(evm_address)