Merge pull request #11182 from Eversmile12/patch-1

Update index.md - add codehawks/cyfrin

Author: wackerow

public/content/developers/docs/smart-contracts/security/index.md

@@ -506,6 +506,11 @@ If you plan on querying an on-chain oracle for asset prices, consider using one
 
 - **[Code4rena](https://code4rena.com/)** - _Competitive audit platform that incentivizes smart contract security experts to find vulnerabilities and help make web3 more secure._
 
+- **[CodeHawks](https://codehawks.com/)** - _Competitive audits platform hosting smart contracts auditing competitions for security researchers.
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+- **[Cyfrin](https://www.cyfrin.io/)** - _Blockchain security and web3 education firm focused on EVM and Vyper based protocols._
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 ### Bug bounty platforms {#bug-bounty-platforms}
 
 - **[Immunefi](https://immunefi.com/)** - _Bug bounty platform for smart contracts and DeFi projects, where security researchers review code, disclose vulnerabilities, get paid, and make crypto safer._