Updated modules based on feedback

[abhisnan]

Issue #, if available:

Description of changes:
Introduction

• Updated the Introduction module to include Network Security and Infrastructure Security modules' details

Identity and Access Management

• Updated the output value of Check Output if you running at AWS Event in Using AWS IAM Groups and Roles to Manage Kubernetes Cluster Access mdule
• Updated the commands under Add in ~/.aws/config section in Using AWS IAM Groups and Roles to Manage Kubernetes Cluster Access module
• Added installation command for yq in Using AWS IAM Groups and Roles to Manage Kubernetes Cluster Access module
• Added export command for $EKS_CLUSTER_NAME in Enable EKS Pod Identity module
• Updated the EKS Pod Identity webhook link in Deep Dive into EKS Pod Identity module

Regulatory Compliance

• Updated the aqua docker image to docker.io/aquasec/kube-bench:v0.6.19 in Lab 3 - Kube-bench Integration with AWS Security Hub module as the container image docker.io/aquasec/kube-bench:latest has an open issue

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[allamand]

LGTM