fix: replace deprecated rinkeby testnet with goerli in "hardhat.config.ts"

hardhat.config.ts

@@ -25,12 +25,12 @@ const chainIds = {
   "arbitrum-mainnet": 42161,
   avalanche: 43114,
   bsc: 56,
+  goerli: 5,
   hardhat: 31337,
   mainnet: 1,
   "optimism-mainnet": 10,
   "polygon-mainnet": 137,
   "polygon-mumbai": 80001,
-  rinkeby: 4,
 };
 
 function getChainConfig(chain: keyof typeof chainIds): NetworkUserConfig {
@@ -63,11 +63,11 @@ const config: HardhatUserConfig = {
       arbitrumOne: process.env.ARBISCAN_API_KEY || "",
       avalanche: process.env.SNOWTRACE_API_KEY || "",
       bsc: process.env.BSCSCAN_API_KEY || "",
+      goerli: process.env.ETHERSCAN_API_KEY || "",
       mainnet: process.env.ETHERSCAN_API_KEY || "",
       optimisticEthereum: process.env.OPTIMISM_API_KEY || "",
       polygon: process.env.POLYGONSCAN_API_KEY || "",
       polygonMumbai: process.env.POLYGONSCAN_API_KEY || "",
-      rinkeby: process.env.ETHERSCAN_API_KEY || "",
     },
   },
   gasReporter: {
@@ -86,11 +86,11 @@ const config: HardhatUserConfig = {
     arbitrum: getChainConfig("arbitrum-mainnet"),
     avalanche: getChainConfig("avalanche"),
     bsc: getChainConfig("bsc"),
+    goerli: getChainConfig("goerli"),
     mainnet: getChainConfig("mainnet"),
     optimism: getChainConfig("optimism-mainnet"),
     "polygon-mainnet": getChainConfig("polygon-mainnet"),
     "polygon-mumbai": getChainConfig("polygon-mumbai"),
-    rinkeby: getChainConfig("rinkeby"),
   },
   paths: {
     artifacts: "./artifacts",