chore(deps): update terraform cloudposse/iam-role/aws to v0.20.0 #54

Job	Run time
terraform-module / CI / Labels Validate	3s
terraform-module / Readme	0s
terraform-module / CI / bats	35s
terraform-module / CI / Format HCL	11s
terraform-module / CI / Find modules	2s
terraform-module / CI / Validate Codeowners (syntax)	4s
terraform-module / CI / Validate Codeowners (owners)	0s
terraform-module / CI / Lint (.)	17s
terraform-module / CI / Lint (./examples/cis)	16s
terraform-module / CI / Lint (./examples/complete)	14s
terraform-module / CI / Lint (./examples/hipaa)	22s
terraform-module / CI / Lint (./modules/cis-1-2-rules)	14s
terraform-module / CI / Lint (./modules/conformance-pack)	15s
terraform-module / ci	1s
terraform-module / Release	0s
	2m 34s

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