fix: Removed deprecated option and updated readme - asg deploys

[glangston83]

https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_RequestSpotInstances.html

Description

block_duration_minutes spot instances option is deprecated

Motivation and Context

Removing a deprecated option from request_spot_instances API

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

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

[glangston83]

tested with main code example resulted in terraform apply working setting up ASG, but instances would launch with same error as aleks-fofanov/terraform-gitlab-runner-aws-spot#3

Removed deprecated code and re-tested and spot instances launched

[github-actions]

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[github-actions]

This PR was automatically closed because of stale in 10 days

[github-actions]

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