docs(s3vectors_index): use correct attribute name kms_key_arn

[evan-cohen]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Description

Resolves an inconsistency between the documentation and implementation for the encryption_configuration block of the aws_s3vectors_index resource as introduced in v6.26.0.

The enhancement to the aws_s3vectors_index resource in #45470 includes an encryption_configuration block with a kms_key_arn attribute:

terraform-provider-aws/internal/service/s3vectors/index.go

Lines 297 to 300 in b6c16ac

	type indexEncryptionConfigurationModel struct {
	KMSKeyARN fwtypes.ARN `tfsdk:"kms_key_arn"`
	SseType fwtypes.StringEnum[awstypes.SseType] `tfsdk:"sse_type"`
	}

terraform-provider-aws/internal/service/s3vectors/index_test.go

Lines 418 to 430 in b6c16ac

	resource "aws_s3vectors_index" "test" {
	index_name = %[1]q
	vector_bucket_name = aws_s3vectors_vector_bucket.test.vector_bucket_name
	data_type = "float32"
	dimension = 2
	distance_metric = "euclidean"
	encryption_configuration {
	kms_key_arn = aws_kms_key.test.arn
	sse_type = "aws:kms"
	}
	}

...but the corresponding documentation uses the attribute name "kms_key_id" instead:

terraform-provider-aws/website/docs/r/s3vectors_index.html.markdown

Lines 47 to 50 in b6c16ac

	The `encryption_configuration` block supports the following attributes:
	* `kms_key_id` - (Optional, Forces new resource) AWS Key Management Service (KMS) customer managed key ID to use for the encryption configuration. This parameter is allowed if and only if `sse_type` is set to `aws:kms`.
	* `sse_type` - (Optional, Forces new resource) Type of encryption to use. Valid values: `AES256`, `aws:kms`. Defaults to `AES256`.

Relations

Relates #45470

[github-actions]

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[ewbankkit]

LGTM 🚀.

[ewbankkit]

@evan-cohen Thanks for the contribution 🎉 👏.

[github-actions]

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