docs: Add ALB endpoint to example outputs

[setheliot]

Description

Add ALB endpoint to outputs for the ec2-autoscaling and complete examples

Motivation and Context

After running terraform apply, this makes it easier to find the ALB endpoint and test the deployment

Breaking Changes

No

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

This change is made only to an example itself.

• I have executed pre-commit run -a on my pull request

$ pre-commit run -a                                                   

Terraform fmt............................................................Passed
Terraform wrapper with for_each in module................................Passed
Terraform docs...........................................................Passed
Terraform validate with tflint...........................................Passed
Terraform validate.......................................................Passed
check for merge conflicts................................................Passed
fix end of files.........................................................Passed
trim trailing whitespace.................................................Passed

[setheliot]

hi @antonbabenko -- may I get a review and hopefully a merge?

[setheliot]

Thank you @bryantbiggs - I have incorporated all of your feedback

[github-actions]

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