Fix unsupported link rendering

User guide example Jupyter notebook tried to render a code
block as a link with [`link-text`](...). This is supported
within Jupyter, but when rendering the example to build the docs
via Sphinx, the link rendering gets broken as that particular
pattern is not supported.

Author: amas0

docsrc/users-guide/examples/Variational Inference.ipynb

@@ -56,7 +56,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The class [`CmdStanVB`](https://mc-stan.org/cmdstanpy/api.html#cmdstanvb) provides the following properties to access information about the parameter names, estimated means, and the sample:\n",
+    "The [CmdStanVB](https://mc-stan.org/cmdstanpy/api.html#cmdstanvb) object provides the following properties to access information about the parameter names, estimated means, and the sample:\n",
     "\n",
     "  + `column_names` - list of column names\n",
     "  + `columns` - number of columns\n",