Add Machine Learning Courses (Classic Time Series Forecasting) (#6586)

* Add Machine Learning Courses (Classic Time Series Forecasting)

Courses on Youtube Machine Learning (Classic Time Series Forecasting)

* Update Machine Learning Courses (Classic Time Series Forecasting)

fix error "update according to alphabet"

courses/free-courses-id.md

@@ -262,6 +262,7 @@
 ### Machine Learning
 
 * [Belajar Dasar Visualisasi Data](https://www.dicoding.com/academies/177) - Dicoding, membutuhkan registrasi
+* [Classic Time Series Forecasting | Indonesia](https://www.youtube.com/playlist?list=PLGn1wRmlR3Ms7wr2zgtcC4LaE_NHQAEjx) - Wira DKP, JCOp Untuk Indonesia (Youtube)
 * [Tutorial Belajar Machine Learning Dasar \| Python Scikit-Learn](https://www.youtube.com/playlist?list=PL2O3HdJI4voHNEv59SdXKRQVRZAFmwN9E) - Setia Budi, Indonesia Belajar (Youtube)