Update input-aws-s3.asciidoc to reflect auto gzip decompression

[RichardoC]

Proposed commit message

This PR is to enhance documentation for the input aws-s3 to reflect the transparent gzip decompression behaviour

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

Author's Checklist

• [ ]

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[cla-checker-service]

💚 CLA has been signed

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @RichardoC? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b patch-1 upstream/patch-1
git merge upstream/main
git push upstream patch-1

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b patch-1 upstream/patch-1
git merge upstream/main
git push upstream patch-1

[elasticmachine]

Pinging @elastic/obs-ds-hosted-services (Team:obs-ds-hosted-services)

[RichardoC]

This pull request is now in conflicts. Could you fix it? 🙏 To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b patch-1 upstream/patch-1
git merge upstream/main
git push upstream patch-1

Will do once it's reviewed as I don't want to spend time continually fixing this merge conflict

[kaiyan-sheng]

Thanks for the update! I dont think we need a changelog here for documentation change.