feat: switch to go-task/setup-task and update shell to /bin/ash in Do… #16

Job	Run time
call / release	13s
call / verify-release-ref-tags	0s
call / e2e-action-container-structure-test	0s
call / e2e-action-format-hcl	0s
call / e2e-action-template-action	0s
call / e2e-action-pull-request	0s
call / e2e-action-terraform-copy-vars	0s
call / e2e-action-terraform-validate	0s
call / e2e-action-tflint	0s
call / e2e-action-commit-push	0s
	13s

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