message: style: fix whitespace in mainnet.md
diff: @@ -6,7 +6,7 @@ Network information can be found at https://thegraph.com/explorer/network. The G
  | Component | Release |
  | --------------- | -------------------------------------------------------------------------- |
  -| contracts | [1.11.1](https://github.com/graphprotocol/contracts/releases/tag/v1.11.1) x|
  +| contracts | [1.11.1](https://github.com/graphprotocol/contracts/releases/tag/v1.11.1) |
  | indexer-agent | [0.18.6](https://github.com/graphprotocol/indexer/releases/tag/v0.18.6) |
  | indexer-cli | [0.18.6](https://github.com/graphprotocol/indexer/releases/tag/v0.18.6) |
  | indexer-service | [0.18.6](https://github.com/graphprotocol/indexer/releases/tag/v0.18.6) |
  