docs: fix broken pruning config link in MNIST pruning tutorial

Author: Utkarsh Simha

docs/src/tutorials/mnist_pruning.ipynb

@@ -445,9 +445,7 @@
    "cell_type": "markdown",
    "id": "cell-25",
    "metadata": {},
-   "source": [
-    "For this tutorial, we'll apply 50% unstructured magnitude pruning (individual elements, not whole channels) via `PruningSpec`. Refer to the [Pruning Config](../pruning/config.html) page for all options."
-   ]
+   "source": "For this tutorial, we'll apply 50% unstructured magnitude pruning (individual elements, not whole channels) via `PruningSpec`. Refer to the [Pruning Config](https://apple.github.io/coreai-optimization/pruning/config.html) page for all options."
   },
   {
    "cell_type": "code",