Update s3_bucket_ownership_controls.html.markdown (#22229)

Add missing valid value

Author: 11mariom

website/docs/r/s3_bucket_ownership_controls.html.markdown

@@ -37,7 +37,7 @@ The following arguments are required:
 
 The following arguments are required:
 
-* `object_ownership` - (Required) Object ownership. Valid values: `BucketOwnerPreferred` or `ObjectWriter`
+* `object_ownership` - (Required) Object ownership. Valid values: `BucketOwnerPreferred`, `ObjectWriter` or `BucketOwnerEnforced`
     * `BucketOwnerPreferred` - Objects uploaded to the bucket change ownership to the bucket owner if the objects are uploaded with the `bucket-owner-full-control` canned ACL.
     * `ObjectWriter` - The uploading account will own the object if the object is uploaded with the `bucket-owner-full-control` canned ACL.
     * `BucketOwnerEnforced` - The bucket owner automatically owns and has full control over every object in the bucket. ACLs no longer affect permissions to data in the S3 bucket.