add comment for neurodata types index

Author: magland

src/pages/DandiPage/fetchNeurodataTypesIndex.ts

@@ -14,6 +14,8 @@ let cachedNeurodataTypesIndex: NeurodataTypesIndex | undefined = undefined;
 export const fetchNeurodataTypesIndex = async () => {
   if (cachedNeurodataTypesIndex) return cachedNeurodataTypesIndex;
   try {
+    // This is created by the workflow in https://github.com/magland/neurosift-kerchunker
+    // See https://github.com/magland/neurosift-kerchunker/blob/main/workflow_scripts/create_neurodata_types_index.py
     const url =
       "https://lindi.neurosift.org/dandi/neurodata_types_index.json.gz";
     const response = await fetch(url + "?cb=" + Date.now());