typo fix

Author: hkir-dev

src/solid/TelephoneDataset.ts

@@ -1,6 +1,6 @@
 import { DatasetWrapper } from 'rdfjs-wrapper';
 import { VCARD } from '../vocabulary/vcard.js';
-import { Telephone } from './Telephone';
+import { Telephone } from './Telephone.js';
 
 export class TelephoneDataset extends DatasetWrapper {
   get telephone(): Iterable<Telephone> {