Add aws solution architect resources (changes made) (#9719)

* Add aws solution architect resources

* Change platform url to coursera

* Fix Alphabetical ordering

* Change time-limited course

* Remove youtube playlist

courses/free-courses-en.md

@@ -366,6 +366,7 @@
 #### AWS
 
 * [AWS Certified Cloud Practitioner Course](https://youtube.com/playlist?list=PLt1SIbA8guuvfvUDVLpJepmbnYpOfYCIB) - Stephane Maarek
+* [AWS Power Hour: Architecting](https://pages.awscloud.com/traincert-twitch-power-hour-architecting.html?saa=sec&sec=prep) - AWS
 * [AWS Tutorial For Beginners](https://youtube.com/playlist?list=PLEiEAq2VkUULlNtIFhEQHo8gacvme35rz) - Simplilearn
 * [AWS Zero to Hero](https://www.youtube.com/playlist?list=PLdpzxOOAlwvLNOxX0RfndiYSt1Le9azze) - Abhishek Veeramalla
 * [Cloud Computing Basics with AWS](https://trailhead.salesforce.com/content/learn/modules/aws-cloud) - Trailhead (Salesforce) (email address *required*)