ci(mergify): upgrade configuration to current format #552

Job	Run time
terraform-module / CI / Format HCL	17s
terraform-module / CI / Validate Codeowners (syntax)	4s
terraform-module / CI / Labels Validate	5s
terraform-module / CI / Find modules	6s
terraform-module / CI / Validate Codeowners (owners)	39s
terraform-module / CI / bats	33s
terraform-module / Readme	-1s
terraform-module / CI / Lint (./examples/complete)	14s
terraform-module / CI / Lint (.)	13s
terraform-module / ci	4s
terraform-module / Release	0s
	2m 14s

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