minor nits to icechunk noaa append ex

examples/append/noaa-cdr-sst.ipynb

@@ -12,16 +12,6 @@
     "Please ensure the correct dependencies are installed before starting."
    ]
   },
-  {
-   "cell_type": "markdown",
-   "id": "b3a6769f",
-   "metadata": {},
-   "source": [
-    "\n",
-    "## Warning\n",
-    " This example is failing due to icechunk/virtualizarr/zarr v3 issues: https://github.com/zarr-developers/zarr-python/issues/2800\n"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -125,6 +115,16 @@
     ")"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c025f35d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "virtual_ds"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -207,7 +207,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ds = xr.open_zarr(repo, consolidated=False, zarr_format=3)\n",
+    "read_session = repo.readonly_session(branch=\"main\")\n",
+    "ds = xr.open_zarr(read_session.store, consolidated=False, zarr_format=3)\n",
     "ds"
    ]
   },
@@ -279,7 +280,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "repo.commit(\"wrote 2 more days of data\")"
+    "append_session.commit(\"wrote 2 more days of data\")"
    ]
   },
   {
@@ -297,7 +298,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "read_session = repo.readonly_session(\"main\")"
+    "read_session = repo.readonly_session(branch=\"main\")"
    ]
   },
   {
@@ -314,7 +315,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "scratch",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },