update nb

Author: Kyle Beyer

examples/plotting_differential_xs.ipynb

@@ -839,7 +839,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 33,
+   "execution_count": 34,
    "id": "a72103d0-91cc-4c5b-8df1-43a519fa9fa9",
    "metadata": {},
    "outputs": [
@@ -874,7 +874,7 @@
     ")\n",
     "ax.set_xlim([-5, 265])\n",
     "\n",
-    "plt.savefig(\"lead_208_pp_dxds.pdf\")"
+    "plt.savefig(\"lead_208_pp_dxds.png\")"
    ]
   },
   {