update usage notebook

docs/notebooks/usage.ipynb

@@ -233,7 +233,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Finally, `xclim` also allows us to call indicators using datasets and variable names."
+    "`xclim` also allows us to call indicators using datasets and variable names."
    ]
   },
   {
@@ -255,6 +255,26 @@
     "gdd"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Finally, we can also get datasets as an output with the `as_dataset` option."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "with xclim.set_options(as_dataset=True, cf_compliance=\"log\"):\n",
+    "    gdd_ds = xclim.atmos.growing_degree_days(\n",
+    "        tas=daily_ds.air, thresh=\"10 degC\", freq=\"YS\", date_bounds=(\"04-01\", \"09-30\")\n",
+    "    )\n",
+    "gdd_ds"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -367,9 +387,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.10"
+   "version": "3.11.7"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }