Always include API version header (#19)

internal/provider/attestation_authority/data_source.go

internal/provider/attestation_authority/resource.go

internal/provider/authority/data_source.go

internal/provider/authority/resource.go

internal/provider/cert_client.go

internal/provider/collection/data_source.go

internal/provider/collection/resource.go

internal/provider/collection/resource_test.go

internal/provider/collection_instance/data_source.go

internal/provider/collection_instance/resource.go

internal/provider/device_collection/resource.go

internal/provider/provider.go

internal/provider/provisioner/data_source.go

internal/provider/provisioner/resource.go

internal/provider/webhook/data_source.go

internal/provider/webhook/resource.go

internal/provider/workload/resource.go