Fix: typo error and API_KEY (#2668)

* Update interact-with-erc-20-tokens.md

* Update javascript-dotenv.md

* Update javascript-dotenv.md

---------

Co-authored-by: Byron Gravenorst <50852695+bgravenorst@users.noreply.github.com>

Author: autumncrypto

services/how-to/interact-with-erc-20-tokens.md

@@ -124,7 +124,7 @@ curl https://mainnet.infura.io/v3/<YOUR-API-KEY> \
         "0x000000000000000000000000dfbaf3e4c7496dad574a1b842bc85b402bdc298d"
       ],
       "data": "0x00000000000000000000000000000000000000000000041f900d25d6693623a6",
-      "blockNumbern": "0x91F37C"
+      "blockNumber": "0x91F37C"
     }
   ]
 }

services/how-to/javascript-dotenv.md

@@ -37,7 +37,7 @@ You can create a `package.json` file by running a CLI questionnaire, or by creat
 At the root of your project directory, create a file named `.env` containing environment variables for sensitive information that shouldn't be shared, such as an Infura API key, Ethereum private key, or MetaMask secret recovery phrase:
 
 ```bash
-INFURA_API_KEY = "<YOUR-API-KEY>"
+RPC_URL = "https://sepolia.infura.io/v3/<YOUR-API-KEY>"
 PRIVATE_KEY = "<YOUR-PRIVATE-KEY>"
 ```
 
@@ -64,8 +64,8 @@ require("dotenv").config()
 module.exports = {
   solidity: "0.8.0",
   networks: {
-    rinkeby: {
-      url: process.env.INFURA_API_KEY,
+    sepolia: {
+      url: process.env.RPC_URL,
       accounts: [process.env.PRIVATE_KEY],
     },
   },