Terraform course added in courses/free-courses-en.md (#8216)

* Terraform course added in courses/free-courses-en.md

* Update courses/free-courses-en.md

Done👍

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

* Update courses/free-courses-en.md

Done 👍

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

courses/free-courses-en.md

@@ -87,6 +87,7 @@
 * [Spark](#spark)
 * [Swift](#swift)
     * [Vapor](#vapor)
+* [Terraform](#terraform)
 * [Theory](#theory)
 * [TypeScript](#typescript)
     * [Angular](#angular)
@@ -1173,6 +1174,16 @@
 * [Vapor University](https://vapor.university)
 
 
+### Terraform
+
+* [terraform + AWS](https://www.udemy.com/course/terraform-aws) - Rohit Abraham (Udemy)
+* [Terraform + GCP](https://www.udemy.com/course/terraform-gcp) - Rohit Abraham (Udemy)
+* [Terraform 101](https://www.udemy.com/course/terraform-101) - Jacob Jones (Udemy)
+* [Terraform on Azure - Basic Tutorial](https://www.udemy.com/course/terraform-on-azure-basic-tutorial) - Rahul Sawant (Udemy)
+* [Terraform tutorial for beginners Videos in English by Techworld with Murali](https://www.youtube.com/playlist?list=PLuJTeEt6HH9fUj7oRRLT0g1ttVl--Fv1T) - Murali
+* [Terraform Tutorials](https://www.youtube.com/playlist?list=PL2qzCKTbjutKff_ns750TFESQc44nlULv) - Narendra
+
+
 ### Theory
 
 * [Automata Theory](https://online.stanford.edu/courses/soe-ycsautomata-automata-theory)