Fix typo in MultiDialog.py

MultiDialog.py

@@ -111,7 +111,7 @@ class Multidialog(datasets.GeneratorBasedBuilder):
         # 3. prepare sharded metadata csv files
         meta_urls = {
             split: [
-                    _META_URL.format(subset=split, archiv_id=i)
+                    _META_URL.format(subset=split, archive_id=i)
                     for i in range(n_archives[split][1])
                 ]
             for split in splits