Incorrect mega-eth testnet chain ID

[trocher]

The chain ID for mega-eth is 6343, however, it is stored as 6342:

chains/_data/chains/eip155-6342.json

Lines 13 to 14 in 876f06e

	"chainId": 6342,
	"networkId": 6342,

Source:

curl -s -X POST https://carrot.megaeth.com/rpc \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}'

{"jsonrpc":"2.0","id":1,"result":"0x18c7"}