message: Update indexer components to 0.20.4 on testnet
diff: @@ -17,9 +17,9 @@ For testnet:
  | Component | Release |
  | --------------- | -------------------------------------------------------------------------- |
  | contracts | [1.13.0](https://github.com/graphprotocol/contracts/releases/tag/v1.13.0) |
  -| indexer-agent | [0.20.3](https://github.com/graphprotocol/indexer/releases/tag/v0.20.3) |
  -| indexer-cli | [0.20.3](https://github.com/graphprotocol/indexer/releases/tag/v0.20.3) |
  -| indexer-service | [0.20.3](https://github.com/graphprotocol/indexer/releases/tag/v0.20.3) |
  +| indexer-agent | [0.20.4](https://github.com/graphprotocol/indexer/releases/tag/v0.20.4) |
  +| indexer-cli | [0.20.4](https://github.com/graphprotocol/indexer/releases/tag/v0.20.4) |
  +| indexer-service | [0.20.4](https://github.com/graphprotocol/indexer/releases/tag/v0.20.4) |
  | graph-node | [0.28.2](https://github.com/graphprotocol/graph-node/releases/tag/v0.28.2) |
  ## Mainnet (https://network.thegraph.com)
  