change obs indices

Author: chiral-carbon

examples/mixture_models/gaussian_mixture_model.ipynb

@@ -15,7 +15,10 @@
    "source": [
     "# Marginalized Gaussian Mixture Model\n",
     "\n",
-    "Author: [Austin Rochford](http://austinrochford.com)"
+    ":::{post} Sept 17, 2021\n",
+    ":tags: mixture model\n",
+    ":category: intermediate\n",
+    ":::"
    ]
   },
   {
@@ -511,6 +514,27 @@
     "az.plot_ppc(trace);"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Author: [Austin Rochford](http://austinrochford.com)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## References"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Watermark"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 11,