message: docs: point to new specs repository
diff: -# Optimistic Specs
  +# The Optimistic Ethereum Spec
  -Welcome to Optimism's specs.
  +## Notice
  -Please refer to the README in each of the subdirectories for a table of contents.
  -
  -### Usage
  -
  -We provide some basic yarn scripts to ensure consistent formatting.
  -
  -After modifying any of the markdown files here, run `yarn format`.
  -
  -```bash
  -yarn format
  -```
  +We're in the process of moving our specifications to the [optimistic-specs](https://github.com/ethereum-optimism/optimistic-specs) repository.
  +**The specifications within this folder may be entirely outdated**.
  +Please refer to the `optimistic-specs` repository for the most up-to-date system specifications.
  +We will remove this folder once the migration process is complete.
  