Update getLinkById.js

Author: Dmitriy-Xawstov

UsesCases/Links/get/getLinkById.js

@@ -5,7 +5,7 @@
 // 6. Perform some action after successful retrieving the Link Annotation from document
 // All values of variables starting with "YOUR_****" should be replaced by real user values
 
-import credentials from "./credentials.json"  with { type: "json" };
+import credentials from "./credentials.json"  with { type: "json" };    // json-file in this format: { "id": "*****", "key": "*******" }
 import fs from 'node:fs/promises';
 import path from "node:path";
 import { PdfApi } from "asposepdfcloud";