swap radar chart link on githb for nbviewer link

Author: pmaji

README.md

@@ -15,7 +15,7 @@ Note: GitHub often has trouble rendering larger .ipynb files in particular. If y
  3. [EDA and Basic Viz. -- R](https://github.com/pmaji/stats-and-modeling/blob/master/eda-and-visualization/eda_and_visualization.md)
  4. [EDA and Basic Viz. -- Python](https://github.com/pmaji/data-science-toolkit/blob/master/eda-and-visualization/eda_and_visualization.ipynb)
  5. [Visualizing Geographic Data -- Python](https://github.com/pmaji/data-science-toolkit/blob/master/eda-and-visualization/geo_mapping_viz.ipynb)
- 6. [Radar Charts -- Python](https://github.com/pmaji/data-science-toolkit/blob/master/eda-and-visualization/radar_charts.ipynb)
+ 6. [Radar Charts -- Python](https://nbviewer.jupyter.org/github/pmaji/data-science-toolkit/blob/master/eda-and-visualization/radar_charts.ipynb?flush_cache=true)
 3. Hypothesis Testing
  1. [Kolmogorov-Smirnov Test (KS Test) -- R](https://github.com/pmaji/stats-and-modeling/blob/master/hypothesis-tests/ks_test.md)
  2. [Useful Hypothesis Testing Functions -- R](https://github.com/pmaji/stats-and-modeling/blob/master/hypothesis-tests/useful_hyp_test_functions.R)