docs: Clarify AI Engineering best practices in README

Updated the wording for clarity regarding AI Engineering best practices.

Author: Prajwal-Microsoft

README.md

@@ -197,7 +197,7 @@ Check out similar solution accelerators
 
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-💡 Want to get familiar with Microsoft's AI and Data Engineering best practices? Check out our playbooks to learn more
+💡 Want to get familiar with Microsoft's AI Engineering best practices? Check out our playbook to learn more
 
 | Playbook | Description |
 |:---|:---|