fix(authorization): apply terraform fmt to custom role example data sources

Three data source example files had misaligned attribute assignments
that failed the terraform fmt CI check.

Co-authored-by: Claude <noreply@anthropic.com>

Author: frosty-geek

examples/data-sources/stackit_authorization_folder_custom_role/data-source.tf

@@ -1,5 +1,5 @@
 data "stackit_authorization_folder_custom_role" "example" {
   resource_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
-  name       = "my.custom.role"
+  name        = "my.custom.role"
 }
 

examples/data-sources/stackit_authorization_organization_custom_role/data-source.tf

@@ -1,5 +1,5 @@
 data "stackit_authorization_organization_custom_role" "example" {
   resource_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
-  name       = "my.custom.role"
+  name        = "my.custom.role"
 }
 

examples/data-sources/stackit_authorization_project_custom_role/data-source.tf

@@ -1,5 +1,5 @@
 data "stackit_authorization_project_custom_role" "example" {
   resource_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
-  name       = "my.custom.role"
+  name        = "my.custom.role"
 }