docs(events-targets): add documentation of invoking AwsApi method

[badmintoncryer]

Issue # (if applicable)

None

Reason for this change

The targets.AwsApi() method enables us to call AWS API from EventBridge directly but there is no documentation about this feature.

Description of changes

Update README.md

Describe any new or updated permissions being added

None

Description of how you validated changes

None

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[ozelalisen]

LGTM!

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[mergify]

This pull request has been removed from the queue for the following reason: checks failed.

The merge conditions cannot be satisfied due to failing checks:

You may have to fix your CI before adding the pull request to the queue again.
If you update this pull request, to fix the CI, it will automatically be requeued once the queue conditions match again.
If you think this was a flaky issue instead, you can requeue the pull request, without updating it, by posting a @mergifyio requeue comment.

[badmintoncryer]

@mergify requeue

[mergify]

requeue

❌ Command disallowed due to command restrictions in the Mergify configuration.

• sender-permission >= write

[badmintoncryer]

@mergify update

[mergify]

update

✅ Branch has been successfully updated

[ozelalisen]

@Mergifyio update

[mergify]

update

☑️ Nothing to do, the required conditions are not met

• #commits-behind > 0 [📌 update requirement]
• -closed [📌 update requirement]
• -conflict [📌 update requirement]
• queue-position = -1 [📌 update requirement]

[badmintoncryer]

@ozelalisen could you please execute mergify requeue command? I don't have a enough permission.

#35309 (comment)

[ozelalisen]

@Mergifyio requeue

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[mergify]

requeue

☑️ This pull request is already queued

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