Fix the applyTo property in the instructions files

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

instructions/containerization-docker-best-practices.instructions.md

@@ -1,5 +1,5 @@
 ---
-applyTo: ['*']
+applyTo: '*'
 description: 'Comprehensive best practices for creating optimized, secure, and efficient Docker images and managing containers. Covers multi-stage builds, image layer optimization, security scanning, and runtime best practices.'
 ---
 

instructions/devops-core-principles.instructions.md

@@ -1,5 +1,5 @@
 ---
-applyTo: ['*']
+applyTo: '*'
 description: 'Foundational instructions covering core DevOps principles, culture (CALMS), and key metrics (DORA) to guide GitHub Copilot in understanding and promoting effective software delivery.'
 ---
 

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

@@ -1,5 +1,5 @@
 ---
-applyTo: ['*']
+applyTo: '*'
 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.'
 ---
 

instructions/kubernetes-deployment-best-practices.instructions.md

@@ -1,5 +1,5 @@
 ---
-applyTo: ['*']
+applyTo: '*'
 description: 'Comprehensive best practices for deploying and managing applications on Kubernetes. Covers Pods, Deployments, Services, Ingress, ConfigMaps, Secrets, health checks, resource limits, scaling, and security contexts.'
 ---
 

instructions/security-and-owasp.instructions.md

@@ -1,5 +1,5 @@
 ---
-applyTo: ["*"]
+applyTo: "*"
 description: "Comprehensive secure coding instructions for all languages and frameworks, based on OWASP Top 10 and industry best practices."
 ---
 # Secure Coding and OWASP Guidelines