test caption rendering on github

Author: Yara Mohajerani

01_MachineLearning_NeuralNetworks_Intro.ipynb

@@ -58,7 +58,7 @@
     "\n",
     "\n",
     "![Neural network generic example fromw ww.astroml.org](https://www.astroml.org/_images/fig_neural_network_1.png)\n",
-    "<sub>Schematic from [AstroML](https://www.astroml.org/book_figures/chapter9/fig_neural_network.html#book-fig-chapter9-fig-neural-network)</sub>\n",
+    "<sub>Schematic from [AstroML](https://www.astroml.org/book_figures/chapter9/fig_neural_network.html#book-fig-chapter9-fig-neural-network)\n",
     "    \n",
     "    Figure produced by code under BSD license authored by Jake VanderPlas & Brigitta Sipocz.\n",
     "    The figure produced by this code is published in the textbook \"Statistics, Data Mining, and Machine Learning in Astronomy\" (2019)\n",