fix cat and tree paths, toggle output

Author: scottyhq

intermediate/intro-to-zarr.ipynb

@@ -198,12 +198,12 @@
    "id": "14",
    "metadata": {
     "tags": [
-     "scroll-output"
+     "hide-output"
     ]
    },
    "outputs": [],
    "source": [
-    "!tree -a ../data/test.zarr"
+    "!tree -a {output}"
    ]
   },
   {
@@ -212,12 +212,12 @@
    "id": "15",
    "metadata": {
     "tags": [
-     "scroll-output"
+     "hide-output"
     ]
    },
    "outputs": [],
    "source": [
-    "!cat ../data/test.zarr/zarr.json"
+    "!cat {output}/zarr.json"
    ]
   },
   {