chore: update audit doc to v2 (#9177)

Author: Rjected

README.md

@@ -40,7 +40,7 @@ Reth is production ready, and suitable for usage in mission-critical environment
 
 More historical context below:
 * We released 1.0 "production-ready" stable Reth in June 2024.
-    * Reth completed an audit with [Sigma Prime](https://sigmaprime.io/), the developers of [Lighthouse](https://github.com/sigp/lighthouse), the Rust Consensus Layer implementation. Find it [here](./audit/sigma_prime_audit_v1.pdf).
+    * Reth completed an audit with [Sigma Prime](https://sigmaprime.io/), the developers of [Lighthouse](https://github.com/sigp/lighthouse), the Rust Consensus Layer implementation. Find it [here](./audit/sigma_prime_audit_v2.pdf).
     * Revm (the EVM used in Reth) underwent an audit with [Guido Vranken](https://twitter.com/guidovranken) (#1 [Ethereum Bug Bounty](https://ethereum.org/en/bug-bounty)). We will publish the results soon.
 * We released multiple iterative beta versions, up to [beta.9](https://github.com/paradigmxyz/reth/releases/tag/v0.2.0-beta.9) on Monday June 3rd 2024 the last beta release.
 * We released [beta](https://github.com/paradigmxyz/reth/releases/tag/v0.2.0-beta.1) on Monday March 4th 2024, our first breaking change to the database model, providing faster query speed, smaller database footprint, and allowing "history" to be mounted on separate drives.

audit/sigma_prime_audit_v1.pdf audit/sigma_prime_audit_v2.pdf

@@ -76,7 +76,7 @@ Reth implements the specification of Ethereum as defined in the [ethereum/execut
 1. We operate multiple nodes at the tip of Ethereum mainnet and various testnets.
 1. We extensively unit test, fuzz test and document all our code, while also restricting PRs with aggressive lint rules.
 
-We have completed an audit of the [Reth v1.0.0-rc.2](https://github.com/paradigmxyz/reth/releases/tag/v1.0.0-rc.2) with [Sigma Prime](https://sigmaprime.io/), the developers of [Lighthouse](https://github.com/sigp/lighthouse), the Rust Consensus Layer implementation. Find it [here](https://github.com/paradigmxyz/reth/blob/bf9cac7571f018fec581fe3647862dab527aeafb/audit/sigma_prime_audit_v1.pdf).
+We have completed an audit of the [Reth v1.0.0-rc.2](https://github.com/paradigmxyz/reth/releases/tag/v1.0.0-rc.2) with [Sigma Prime](https://sigmaprime.io/), the developers of [Lighthouse](https://github.com/sigp/lighthouse), the Rust Consensus Layer implementation. Find it [here](https://github.com/paradigmxyz/reth/blob/main/audit/sigma_prime_audit_v2.pdf).
 
 [Revm](https://github.com/bluealloy/revm) (the EVM used in Reth) underwent an audit with [Guido Vranken](https://twitter.com/guidovranken) (#1 [Ethereum Bug Bounty](https://ethereum.org/en/bug-bounty)). We will publish the results soon.