spelling corrections for 09-outro

Author: crbates

09-outro.ipynb

@@ -15,7 +15,7 @@
       "\n",
       "![PyNE Tree](https://raw.github.com/pyne/pyne/staging/img/pyne_icon_big.png)\n",
       "\n",
-      "There are a vareity of other things in PyNE that we are not showing you today because they are impractical in this kind of tutorial:\n",
+      "There are a variety of other things in PyNE that we are not showing you today because they are impractical in this kind of tutorial:\n",
       "\n",
       "* Enrichment\n",
       "* Material Libraries\n",