Added plot image for summarization tutorial.

Author: olavurmortensen

docs/notebooks/summarization_tutorial.ipynb

@@ -385,7 +385,7 @@
       "In the <b>plot below</b>, we see the running times together with the sizes of the datasets. To create datasets of different sizes, we have simply taken prefixes of text; in other words we take the first <i>n</i> characters of the book. The algorithm seems to be <b>polynomial in time</b>, so one needs to be careful before plugging a large dataset into the summarizer.\n",
       "\n",
       "<figure>\n",
-      "    <img src=\"/files/summarizer_running_time.png\">\n",
+      "    <img src=\"/files/summarization_tutorial_plot.png\">\n",
       "    <figcaption></figcaption>\n",
       "</figure>\n",
       "\n",
@@ -402,4 +402,4 @@
    "metadata": {}
   }
  ]
-}
+}