Include .yaml files in applyTo for GitHub Actions instructions (#468)

Updated applyTo field to include .yaml files for workflows.

Author: mpgirro

instructions/github-actions-ci-cd-best-practices.instructions.md

@@ -1,5 +1,5 @@
 ---
-applyTo: '.github/workflows/*.yml'
+applyTo: '.github/workflows/*.yml,.github/workflows/*.yaml'
 description: 'Comprehensive guide for building robust, secure, and efficient CI/CD pipelines using GitHub Actions. Covers workflow structure, jobs, steps, environment variables, secret management, caching, matrix strategies, testing, and deployment strategies.'
 ---