Add V1 revalidation content (#1804)

Author: thedriftofwords

src/content/chainlink-automation/concepts/best-practice.mdx

@@ -37,3 +37,7 @@ Test all of your mission-critical contracts, and stress-test the contract to con
 ### Using ERC-677 Tokens
 
 For registration on Mainnet, you need ERC-677 LINK. Many token bridges give you ERC-20 LINK tokens. Use PegSwap to [convert Chainlink tokens (LINK) to be ERC-677 compatible](https://pegswap.chain.link/). To register on a supported testnet, get [LINK](/resources/link-token-contracts) for the testnet that you want to use from our faucet.
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+### Automation v1 upkeep revalidation
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+If your upkeep is on Automation v1, we recommend that you revalidate the conditions specified in `checkUpkeep` in your `performUpkeep` function. Automation v1 uses a turn taking system where nodes rotate to monitor your upkeep. It does not use consensus.