fix: shorten comment

Author: MantisClone

src/createRequest.js

@@ -9,7 +9,7 @@
   } = require("@requestnetwork/epk-signature");
   const { config } = require("dotenv");
 
-  // Load environment variables from .env file (without overriding variables already set)
+  // Load environment variables from .env file
   config();
 
   const epkSignatureProvider = new EthereumPrivateKeySignatureProvider({