Added one useful resource

Added the Scaler URL to the section - Courses / Academies, providing the upskilling platform to aspiring tech professionals.

Please let me know if further changes are required.

Thank you

Author: Paras-96

README.md

@@ -283,6 +283,7 @@ Courses / Academies
 - [Rock the JVM](https://rockthejvm.com/) teaches Spark (in Scala), Flink and others
 - [Data Engineering Zoomcamp by DataTalksClub](https://dezoomcamp.streamlit.app/)
 - [Efficient Data Processing in Spark](https://josephmachado.podia.com/efficient-data-processing-in-spark)
+- [Scaler](https://www.scaler.com/)
 
 Certifications Courses