Update por-address-list to multi chain (#3481)

Author: mxiao-cll

.changeset/ten-bananas-agree.md

@@ -0,0 +1,5 @@
+---
+'@chainlink/por-address-list-adapter': minor
+---
+
+This EA supports multi chain. To add another chain, include two new env variable {NETWORK}\_RPC_URL and {NETWORK}\_RPC_CHAIN_ID. Then use contractAddressNetwork in param to select the chain. If there is no match, it will default to RPC_URL and CHAIN_ID. For example, BINANCE_RPC_URL and BINANCE_RPC_CHAIN_ID can be selected by "contractAddressNetwork": "binance"

.yarn/cache/@nomicfoundation-edr-darwin-arm64-npm-0.3.5-1d9a58a391-10.zip

@@ -4,6 +4,10 @@
 
 This document was generated automatically. Please see [README Generator](../../scripts#readme-generator) for more info.
 
+## Multi Chain
+
+This EA supports multi chain. To add another chain, include two new env variable {NETWORK}\_RPC_URL and {NETWORK}\_RPC_CHAIN_ID. Then use contractAddressNetwork in param to select the chain. If there is no match, it will default to RPC_URL and CHAIN_ID. For example, BINANCE_RPC_URL and BINANCE_RPC_CHAIN_ID can be selected by "contractAddressNetwork": "binance"
+
 ## Environment Variables
 
 | Required? |         Name          |                                                                       Description                                                                        |  Type  | Options | Default |