Update Onboarding Link for AWS Documentation in DevOps-Security

[srinipandiyan]

Overview

The link for authenticating with credentials for AWS CLI presents with outdated/circular instructions. The setup asks for a short-term token key, which is not setup earlier within onboarding. Without a token key, authentication fails.

An updated resource here will successfully authenticate AWS CLI. It will also speed up onboarding and cause less confusion. The new linked documentation is easier to follow, no links within links, and is implementable from the keys created in the "Generating user access keys" step.

Action Items

Go into Contributing.md file and update link at step Complete the instruction in [AWS Documentation](https://docs.aws.amazon.com/cli/latest/userguide/cli-authentication-short-term.html) to setup the AWS CLI. with the resource attached below.

Resources/Instructions

The most suitable link for this step: https://docs.aws.amazon.com/cli/latest/userguide/cli-authentication-user.html