OIDC on AWS documentation improvement

[baolsen]

Code of Conduct

• [X] I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/configuring-openid-connect-in-amazon-web-services

What part(s) of the article would you like to see updated?

IAM policy currently only shows a snippet and should have a full almost-working example

Additional information

No response

[welcome[bot]]

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[baolsen]

I've submitted a PR, the build is failing because it is modifying restricted files. However this issue requires those files to be modified... Happy for suggestions

[baolsen]

Relates to #15324

[cmwilson21]

@baolsen Thanks for opening an issue and PR! 💖

[Eikyarkway]

plz