update configuration for AWS OIDC to newest version

[nastymajestic]

Description

Update configuration of AWS OIDC to newest version 4.1.2 - https://circleci.com/developer/orbs/orb/circleci/aws-cli
Awaiting approval of PR to aws-cli-orb - PR - 191

Reasons

A link to a GitHub and/or JIRA issue (if applicable).
Otherwise, a brief sentence about why you made these changes.

#8530

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[rosieyohannan]

Hi @nastymajestic thank you so much for this, and sorry for the delays. Your original issue made me realise we have quite a few issues connected to breaking changes in AWS orbs that need updating in the docs so I'm working to get these changes prioritised.