fix a copy/paste mistake in a code example

Author: alex-rind

docs/source/examples/Widget Events.ipynb

@@ -236,7 +236,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "caption = widgets.Label(value='The values of range1 and range2 are synchronized')\n",
+    "caption = widgets.Label(value='The slider value is in its initial position.')\n",
     "slider = widgets.IntSlider(min=-5, max=5, value=1, description='Slider')\n",
     "\n",
     "def handle_slider_change(change):\n",