Document IAM actions required (#2087) (#2109)

This is a backport of PR #2087 as merged into main (02b230f).
SUMMARY
This change documents the IAM actions required in order to use the community.aws.acm_certificate_info module
ISSUE TYPE

Docs Pull Request

COMPONENT NAME
community.aws.acm_certificate_info
ADDITIONAL INFORMATION
I've not done much with documentation in the past, is this the best place to add this?

Reviewed-by: Mark Chappell

Author: patchback[bot]

plugins/modules/acm_certificate_info.py

@@ -13,6 +13,7 @@
   - Note that this will not return information about uploaded keys of size 4096 bits, due to a limitation of the ACM API.
   - Prior to release 5.0.0 this module was called C(community.aws.aws_acm_info).
     The usage did not change.
+  - Requires the IAM permissions 'acm:ListCertificates', 'acm:DescribeCertificate', 'acm:GetCertificate', 'acm:ListTagsForCertificate'
 options:
   certificate_arn:
     description: