message: fix: use ethereum network name instead of id
diff: @@ -50,7 +50,7 @@ indexer. The only requirement is a minimum stake of 100k GRT.
  | Environment Variable | CLI Argument | Value |
  | ------------------------------------------- | ------------------------------- | ------------------------------------------------------- |
  | `INDEXER_AGENT_ETHEREUM` | `--ethereum` | An Ethereum mainnet node/provider |
  -| `INDEXER_AGENT_ETHEREUM_NETWORK` | `--ethereum-network` | `1` |
  +| `INDEXER_AGENT_ETHEREUM_NETWORK` | `--ethereum-network` | `mainnet` |
  | `INDEXER_AGENT_INDEXER_ADDRESS` | `--indexer-address` | Ethereum address of mainnet indexer |
  | `INDEXER_AGENT_INDEXER_GEO_COORDINATES` | `--indexer-geo-coordinates` | Geo coordinates of mainnet indexer infrastructure |
  | `INDEXER_AGENT_MNEMONIC` | `--mnemonic` | Ethereum mnemonic for mainnet operator |
  @@ -73,7 +73,7 @@ option can be used.
  | Environment Variable | CLI Argument | Value |
  | --------------------------------------------- | ------------------------------- | ------------------------------------------------ |
  | `INDEXER_SERVICE_ETHEREUM` | `--ethereum` | An Ethereum mainnet node/provider |
  -| `INDEXER_SERVICE_ETHEREUM_NETWORK` | `--ethereum-network` | `1` |
  +| `INDEXER_SERVICE_ETHEREUM_NETWORK` | `--ethereum-network` | `mainnet` |
  | `INDEXER_SERVICE_INDEXER_ADDRESS` | `--indexer-address` | Ethereum address of mainnet indexer |
  | `INDEXER_SERVICE_MNEMONIC` | `--mnemonic` | Ethereum mnemonic for mainnet operator |
  | `INDEXER_SERVICE_NETWORK_SUBGRAPH_DEPLOYMENT` | `--network-subgraph-deployment` | `Qmf5XXWA8zhHbdvWqtPcR3jFkmb5FLR4MAefEYx8E3pHfr` |
  @@ -170,7 +170,7 @@ testnet (for now) are all mainnet subgraphs. This means:
  | Environment Variable | CLI Argument | Value |
  | ------------------------------------------- | ------------------------------- | ------------------------------------------------------- |
  | `INDEXER_AGENT_ETHEREUM` | `--ethereum` | An Ethereum rinkeby node/provider |
  -| `INDEXER_AGENT_ETHEREUM_NETWORK` | `--ethereum-network` | `4` (rinkeby) |
  +| `INDEXER_AGENT_ETHEREUM_NETWORK` | `--ethereum-network` | `rinkeby` |
  | `INDEXER_AGENT_INDEXER_ADDRESS` | `--indexer-address` | Ethereum address of testnet indexer |
  | `INDEXER_AGENT_INDEXER_GEO_COORDINATES` | `--indexer-geo-coordinates` | Geo coordinates of testnet indexer infrastructure |
  | `INDEXER_AGENT_MNEMONIC` | `--mnemonic` | Ethereum mnemonic for testnet operator |
  @@ -192,7 +192,7 @@ option can be used.
  | Environment Variable | CLI Argument | Value |
  | --------------------------------------------- | ------------------------------- | ------------------------------------------------ |
  | `INDEXER_SERVICE_ETHEREUM` | `--ethereum` | An Ethereum rinkeby node/provider |
  -| `INDEXER_SERVICE_ETHEREUM_NETWORK` | `--ethereum-network` | `4` (rinkeby) |
  +| `INDEXER_SERVICE_ETHEREUM_NETWORK` | `--ethereum-network` | `rinkeby` |
  | `INDEXER_SERVICE_INDEXER_ADDRESS` | `--indexer-address` | Ethereum address of testnet indexer |
  | `INDEXER_SERVICE_MNEMONIC` | `--mnemonic` | Ethereum mnemonic for testnet operator |
  | `INDEXER_SERVICE_NETWORK_SUBGRAPH_DEPLOYMENT` | `--network-subgraph-deployment` | `QmYnGeUXVNZd3MupWqPwZekCriF2CVkpoXZbuSZB9t7eQS` |
  