Fix typo in legend title

Author: tcmetzger

notebooks/05_styling.ipynb

@@ -558,7 +558,7 @@
     "legends_plot.legend.location = \"top_left\"\n",
     "\n",
     "# add a title to your legend\n",
-    "legends_plot.legend.title = \"Obervations\"\n",
+    "legends_plot.legend.title = \"Observations\"\n",
     "\n",
     "# change appearance of legend text\n",
     "legends_plot.legend.label_text_color = \"navy\"\n",