add the document on aws_wafv2_web_acls data source

Author: tabito-hara

website/docs/d/wafv2_web_acls.html.markdown

@@ -0,0 +1,42 @@
+---
+subcategory: "WAF"
+layout: "aws"
+page_title: "AWS: aws_wafv2_web_acls"
+description: |-
+  Retrieves a list of Web ACL names in a region.
+---
+
+# Data Source: aws_wafv2_web_acls
+
+This resource can be useful for getting back a list of Web ACL names for a region.
+
+## Example Usage
+
+The following example retrieves a list of Web ACL names with `REGIONAL` scope.
+
+```terraform
+data "aws_wafv2_web_acls" "example" {
+  scope = "REGIONAL"
+}
+
+output "example" {
+  value = data.aws_wafv2_web_acls.example.names
+}
+
+// Retrieve Web ACL names that start with "FMManagedWebACLv2"
+output "example_managed_by_fm" {
+  value = [for acl_name in data.aws_wafv2_web_acls.example.names : acl_name if startswith(acl_name, "FMManagedWebACLv2")]
+}
+```
+
+## Argument Reference
+
+The following arguments are required:
+
+* `scope` - (Required) The scope of the Web ACLs to be listed. Valid values are `CLOUDFRONT` or `REGIONAL`.
+
+## Attribute Reference
+
+This data source exports the following attributes in addition to the arguments above:
+
+* `names` - A list of Web ACL names with the specified scope.