docs: Update cloudformation reference with tls queue policy

[jonathan-innis]

Fixes #N/A

Description

Update CloudFormation reference to discuss TLS SQS queue policy

How was this change tested?

make presubmit

Does this change impact docs?

• [ ] Yes, PR includes docs updates
• [ ] Yes, issue opened: #
• [x] No

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

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[coveralls]

Pull Request Test Coverage Report for Build 9690922301

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 79.098%

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Totals
Change from base Build 9690889704:	0.0%
Covered Lines:	5786
Relevant Lines:	7315

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9690936369

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 79.111%

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Totals
Change from base Build 9690889704:	0.01%
Covered Lines:	5787
Relevant Lines:	7315

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💛 - Coveralls