Merge pull request #1792 from ethereum-optimism/sc/minor-readme-fix

fix: minor update to primary README

README.md

@@ -32,11 +32,11 @@ Then check out our list of [good first issues](https://github.com/ethereum-optim
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 ├── <a href="./packages">packages</a>
 │   ├── <a href="./packages/contracts">contracts</a>: L1 and L2 smart contracts for Optimistic Ethereum
-│   └── <a href="./packages/core-utils">core-utils</a>: Low-level utilities that make building Optimistic Ethereum easier
-│   └── <a href="./packages/common-ts">common-ts</a>: Common tools for building apps in TypeScript
-│   └── <a href="./packages/data-transport-layer">data-transport-layer</a>: Service for indexing Optimistic Ethereum-related L1 data
-│   └── <a href="./packages/batch-submitter">batch-submitter</a>: Service for submitting batches of transactions and results to L1
-│   └── <a href="./packages/message-relayer">message-relayer</a>: Tool for automatically relaying L1<>L2 messages in development
+│   ├── <a href="./packages/core-utils">core-utils</a>: Low-level utilities that make building Optimistic Ethereum easier
+│   ├── <a href="./packages/common-ts">common-ts</a>: Common tools for building apps in TypeScript
+│   ├── <a href="./packages/data-transport-layer">data-transport-layer</a>: Service for indexing Optimistic Ethereum-related L1 data
+│   ├── <a href="./packages/batch-submitter">batch-submitter</a>: Service for submitting batches of transactions and results to L1
+│   ├── <a href="./packages/message-relayer">message-relayer</a>: Tool for automatically relaying L1<>L2 messages in development
 │   └── <a href="./packages/replica-healthcheck">replica-healthcheck</a>: Service for monitoring the health of a replica node
 ├── <a href="./l2geth">l2geth</a>: Optimistic Ethereum client software, a fork of <a href="https://github.com/ethereum/go-ethereum/tree/v1.9.10">geth v1.9.10</a>
 ├── <a href="./integration-tests">integration-tests</a>: Various integration tests for an Optimistic Ethereum network