fix sidecar typo

Author: mbektas

notebooks/04.01-more-on-output-widget.ipynb

@@ -217,7 +217,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Sidecare: Like output, but on the side\n",
+    "## Sidecar: Like output, but on the side\n",
     "\n",
     "The output widget is helpful but some times it is useful to display output on to the side of the notebook so that the ouitput can be seen as you scroll through the notebook.\n",
     "\n",
@@ -249,7 +249,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The sidecare widget also comes with a capture decorator like the output widget."
+    "The sidecar widget also comes with a capture decorator like the output widget."
    ]
   },
   {