Add Validator manager audit

audits/README.md

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+# Audits
+
+Below is the list of most recent audit for contracts in this repo. Please check out __only__ listed audited versions for production code. Code used should be the final commit audited.
+
+See `audits/historical` for older audits. These audits may now be obsolete, and legacy code superseded by new versions are __not__ recommended for production deployments.
+
+| Date         | Commit     | Auditor      | Scope                | Links                                                       |
+| ------------ | ---------- | ------------ | -------------------- | ----------------------------------------------------------- |
+| Nov 2023    | `6ba46565` | OpenZeppelin | All contracts in the top-level of `contracts/teleporter/` | [🔗](./Teleporter%20Audit%20(November%2016th%202023)%20-%20OpenZeppelin.pdf) |
+| Jan 2024    | `9fcdf42d` | Louis        | Some contracts in `contracts/teleporter/registry` and `contracts/utilities`, see audit for details | [🔗](./Teleporter%20Upgradeable%20Audit%20(January%2010th%202024)%20-%20Louis.pdf) |
+| Jun 2024    | `9e03a1e5` | OpenZeppelin | All contracts in `contracts/ictt/` excluding `mocks/` | [🔗](./ICTT%20Audit%20(June%2026th%202024)%20-%20OpenZeppelin.pdf) |
+| Oct 2024    | `93920df6` | OpenZeppelin | All contracts in `contracts/validator-manager/` | [🔗](./Validator%20Manager%20Audit%20(October%2030th%202024)%20-%20OpenZeppelin.pdf) |