Fix registration link and clean up content (#40245)

Co-authored-by: Sharra-writes <sharra-writes@github.com>

Author: AliciaGorriaran

content/get-started/showcase-your-expertise-with-github-certifications/about-github-certifications.md

@@ -46,19 +46,26 @@ You can highlight your knowledge with the {% data variables.product.prodname_GHA
 
 You can certify your ability to optimize and manage a healthy {% data variables.product.prodname_dotcom %} environment with the {% data variables.product.prodname_dotcom %} Admin exam. This exam covers:
 
-* Repository management
+* Repository management 
 * Workflow optimization
 * Efficient collaboration
 
 ## Getting started with {% data variables.product.prodname_certifications %}
 
-To get started with {% data variables.product.prodname_certifications %}, you can review the different certifications on the [{% data variables.product.prodname_certifications_singular %} Registration](https://examregistration.github.com/overview) page. Every certification page includes details about the skills measured in the exams, how you can prepare, and links to register for the exams.
+To get started with {% data variables.product.prodname_certifications %}, you can review the different certifications on the [{% data variables.product.prodname_certifications_singular %} Registration](https://learn.github.com/credentials) page. Every certification page includes details about the skills measured in the exams, how you can prepare, and links to register for the exams.
 
-If you have the skills, you can register for the exam. If you want additional training, refer to the courses or learning paths in the “Preparing for the certification” section.
+### {% data variables.product.prodname_dotcom %} Copilot Certification
+
+You can certify your capability to optimize software development workflows efficiently {% data variables.product.prodname_dotcom %} with the {% data variables.product.prodname_dotcom %} Copilot exam. This exam covers:
 
-After successful completion of a certificate exam, you will receive a Credly badge and certificate to verify your credentials.
+* Responsible AI
+* Copilot plans & features
+* Copilot data & functionality
+* Prompt engineering
+* AI developer use cases
+* Testing with Copilot
+* Privacy & exclusions
 
-## Further reading
+If you have the skills, you can register for the exam. If you want additional training, refer to the courses or learning paths in the “Preparing for the certification” section.
 
-* [{% data variables.product.prodname_certifications %} Program FAQs](https://examregistration.github.com/faq)
-* [{% data variables.product.prodname_certifications %} - Candidate Handbook](https://examregistration.github.com/handbook)
+After successful completion of a certificate exam, you will receive a badge and certificate to verify your credentials.