bug: fix function name

Signed-off-by: Andrey Fedorov <[email protected]>

Author: fedorov

modules/idc_dataset.ipynb

@@ -215,7 +215,7 @@
     "# 'collections_index' is an optional table with one row per IDC collection.\n",
     "# It adds collection-level metadata not in the per-series 'index' t able,\n",
     "# such as CancerTypes, Subjects count, and collection descriptions.\n",
-    "client.fetch_index_table(\"collections_index\")\n",
+    "client.fetch_index(\"collections_index\")\n",
     "\n",
     "# Join collections_index with the per-series index to filter by both cancer type and modality.\n",
     "# The 'index' table has Modality per series; collections_index has CancerTypes per collection.\n",