update file link

add link to the demo files

online_iNMF_tutorial.ipynb

@@ -29,7 +29,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We first create a Liger object by passing the filenames of HDF5 files containing the raw count data. The data can be downloaded here. Liger assumes by default that the HDF5 files are formatted by the 10X CellRanger pipeline. Large datasets are often generated over multiple 10X runs (for example, multiple biological replicates). In such cases it may be necessary to merge the HDF5 files from each run into a single HDF5 file. We provide the mergeH5 function for this purpose (see below for details)."
+    "We first create a Liger object by passing the filenames of HDF5 files containing the raw count data. The data can be downloaded [here](https://www.dropbox.com/sh/d7fnebmjfv9ueqi/AAA9vlwlCqe-P6T_iPYDier9a?dl=0). Liger assumes by default that the HDF5 files are formatted by the 10X CellRanger pipeline. Large datasets are often generated over multiple 10X runs (for example, multiple biological replicates). In such cases it may be necessary to merge the HDF5 files from each run into a single HDF5 file. We provide the mergeH5 function for this purpose (see below for details)."
    ]
   },
   {
@@ -377,7 +377,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -391,7 +391,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.3"
+   "version": "3.9.12"
   }
  },
  "nbformat": 4,