r\iothub_endpoint_storage_container: Fix file_name_format Schema

[myc2h6o]

file_name_format should not have default value set to false, instead it should have a ValidateFunc same as the nested endpoint property in iothub.

terraform-provider-azurerm/internal/services/iothub/iothub_resource.go

Lines 279 to 283 in d966a79

	"file_name_format": {
	Type: pluginsdk.TypeString,
	Optional: true,
	ValidateFunc: iothubValidate.FileNameFormat,
	},

Test result:
$ TF_ACC=1 go test -v ./internal/services/iothub -run=TestAccIotHubEndpointStorageContainer_ -timeout 60m -ldflags="-X=github.com/hashicorp/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN TestAccIotHubEndpointStorageContainer_basic
=== PAUSE TestAccIotHubEndpointStorageContainer_basic
=== RUN TestAccIotHubEndpointStorageContainer_requiresImport
=== PAUSE TestAccIotHubEndpointStorageContainer_requiresImport
=== CONT TestAccIotHubEndpointStorageContainer_basic
=== CONT TestAccIotHubEndpointStorageContainer_requiresImport
--- PASS: TestAccIotHubEndpointStorageContainer_basic (556.70s)
--- PASS: TestAccIotHubEndpointStorageContainer_requiresImport (597.94s)
PASS
ok github.com/hashicorp/terraform-provider-azurerm/internal/services/iothub 598.822s

[stephybun]

Thanks for fixing this @myc2h6o, LGTM 👍🏼

[github-actions]

This functionality has been released in v2.89.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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