docs: Mention audits in the README

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ENG-4476 Took 6 minutes

README.md

@@ -13,6 +13,11 @@ For complete documentation, see Tycho docs [here](https://docs.propellerheads.xy
 To get started on encoding, have a look at our [Encoding example](examples/encoding-example/README.md).
 For a complete example please refer to the [Tycho Quickstart guide](https://docs.propellerheads.xyz/tycho).
 
-## Report a Vulnerability
+## Security
+
+All audits of the Tycho Router and Executor contracts can be found [here](docs/audits).
+The vulnerabilities discovered during the audits have been acknowledged and addressed or accepted.
+
+### Report a Vulnerability
 
 Contact [security@propellerheads.xyz](mailto:security@propellerheads.xyz)