feat: add machine learning webinar indonesia (#7227)

* feat: add introduction to machine learning indonesia

* Update free-courses-id.md

* fix: fixing linter

* fix: fixing alphabetical order

* Apply review suggestions

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-id.md

@@ -278,6 +278,7 @@
 
 * [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)
+* [Nusantech Webinar - Introduction to Machine Learning](https://www.youtube.com/watch?v=SezDD2ULQ1o) - Nusantech, Galuh Sahid 
 * [Tutorial Belajar Machine Learning Dasar \| Python Scikit-Learn](https://www.youtube.com/playlist?list=PL2O3HdJI4voHNEv59SdXKRQVRZAFmwN9E) - Setia Budi, Indonesia Belajar (YouTube)