Use the temperatures visualization in the README.md file

Author: NicholasMamo

README.md

@@ -4,7 +4,7 @@
 
 A Python library that builds on matplotlib, providing new types of visualizations to help you explore your data and explain it better.
 
-![Example time series](https://raw.githubusercontent.com/NicholasMamo/multiplex-plot/master/examples/exports/3-time-series.png)
+![Example time series](https://raw.githubusercontent.com/NicholasMamo/multiplex-plot/master/examples/exports/3-temperatures.png)
 
 ## Getting Started