Updated latest forecasting book version

Author: nishitpatel01

README.md

@@ -158,7 +158,7 @@ List of Data Science and Machine Learning Resource that I frequently use
 
 
 ### Time Series
-- [Forecasting Principles and Practice](https://otexts.org/fpp2/)
+- [Forecasting Principles and Practice](https://otexts.com/fpp3/)
 - [How To Identify Patterns in Time Series Data](http://www.statsoft.com/textbook/time-series-analysis)
 - [Applied Time Series Characteristics](https://newonlinecourses.science.psu.edu/stat510/node/47/)
 - [CausalImpact using Baysian structure time series](https://google.github.io/CausalImpact/CausalImpact.html)