message: doc: fix mismatched parenthesis
diff: ## Overview
  -[Predeployed smart contracts](./glossary.md#predeployed-contract-predeploy] exist on Optimism
  +[Predeployed smart contracts](./glossary.md#predeployed-contract-predeploy) exist on Optimism
  at predetermined addresses in the genesis state. They are similar to precompiles but instead run
  directly in the EVM instead of running native code outside of the EVM.
  