message: docs: Update testnet vector node version
diff: @@ -21,7 +21,7 @@ For testnet:
  | indexer-cli | [0.13.0](https://github.com/graphprotocol/indexer/releases/tag/v0.13.0) |
  | indexer-service | [0.13.0](https://github.com/graphprotocol/indexer/releases/tag/v0.13.0) |
  | graph-node | [0.22.0](https://github.com/graphprotocol/graph-node/releases/tag/v0.22.0) |
  -| vector_node | [0.2.1](https://hub.docker.com/layers/connextproject/vector_node/0.2.1/images/sha256-81e3bf9aac77c775de84b50935249db4e4631b34c2ab7077bcb812532ba745b8?context=explore) |
  +| vector_node | [a340c8a4 (commit)](https://hub.docker.com/layers/connextproject/vector_node/a340c8a4/images/sha256-b242d3e46c184ce07ce242d743ec16ba6453e50c694609d01104553dfa2216bd?context=explore) |
  ## Mainnet (https://network.thegraph.com)
  