Added info on timing

Author: joannmudge

module_notebooks/06-read-mapping-with-vg.ipynb

@@ -208,7 +208,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<div class=\"alert alert-block alert-success\"> <b>Try this in the cells below:</b>  \n",
+    "<div class=\"alert alert-block alert-success\"> <b>Try this in the cells below (each will take just over 1/2 hour):</b>  \n",
     "    <ul>\n",
     "        <li>Align the SK1 reads to the graph created directly from the full genome (yprp.fullgenome.pggb.giraffe.gbz).</li>\n",
     "        <li>Align the SK1 reads to the graph created by combining the 16 chromosomal subgraphs (yprp.allchrs.pggb.giraff.gbz).</li>\n",