updated plot reference to svg

Author: m4rz910

README.md

@@ -19,12 +19,10 @@ There are three kinds of visualizations currently supported - check them all out
 from nyisotoolkit import NYISOData, NYISOStat, NYISOVis
 nv = NYISOVis(year='2019') #figures saved in nyisotoolkit/nyisovis/visualization folder by default.  
 nv.fig_clcpa_carbon_free(f='D')  # daily (D) or monthy (M) frequency is recommended
-
-#If you want to save to a particular directory, then add the parameter out_dir to the NYISOVis object initialization.
-#It is recommended that you use the pathlib library to create the path.
+print(f"Figures saved by default to: {nv.out_dir} \nYou can change this by passing a pathlib object to the out_dir parameter to the NYISOVis object initialization.")
 
 ```
-![CLCPA](nyisotoolkit/nyisovis/visualizations/2019_clcpa_carbon_free_D.png)
+![CLCPA](nyisotoolkit/nyisovis/visualizations/2019_clcpa_carbon_free_D.svg)
 
 ## NYISOData
 Raw Data Source: http://mis.nyiso.com/public/