feat: add protocol ID change to v1

Author: meyer9

docs/base-chain/specs/upgrades/azul/exec-engine.mdx

@@ -51,6 +51,11 @@ strict equivalence with L1 precompile pricing.
 [EIP-7642](https://eips.ethereum.org/EIPS/eip-7642) updates the Ethereum wire protocol to version 69,
 removing legacy fields from the `Status` message and simplifying the handshake.
 
+### Discovery protocol now uses `basev0` protcol ID
+
+The discovery protocol now uses `basev0` as the protocol ID. This allows Base nodes to find each other more quickly, especially on  networks with fewer nodes like Sepolia.
+
+
 ### Remove Account Balances & Receipts
 
 The `FlashblocksMetadata` payload transmitted over the Flashblocks WebSocket is simplified in Azul.

docs/base-chain/specs/upgrades/azul/overview.mdx

@@ -31,6 +31,7 @@ Only `base-consensus` and `base-reth-node` will support the Base Azul hardfork.
 - [EIP-7642: eth/69](/base-chain/specs/upgrades/azul/exec-engine#eth69)
 - [EIP-7910: eth_config RPC Method](/base-chain/specs/upgrades/azul/exec-engine#eth_config-rpc-method)
 - [Remove Account Balances & Receipts](/base-chain/specs/upgrades/azul/exec-engine#remove-account-balances--receipts)
+- [Use `basev0` protocol ID for discv5](/base-chain/specs/upgrades/azul/exec-engine#discovery-protocol-now-uses-basev0-protcol-id)
 
 ## Proofs