Update the documentation to add description s3_vectors_configuration

including an example usage

Author: tabito-hara

website/docs/r/bedrockagent_knowledge_base.html.markdown

@@ -83,6 +83,48 @@ resource "aws_bedrockagent_knowledge_base" "example" {
 }
 ```
 
+### S3 Vectors Configuration
+
+```terraform
+resource "aws_s3vectors_vector_bucket" "example" {
+  vector_bucket_name = "example-bucket"
+}
+
+resource "aws_s3vectors_index" "example" {
+  index_name         = "example-index"
+  vector_bucket_name = aws_s3vectors_vector_bucket.example.vector_bucket_name
+
+  data_type       = "float32"
+  dimension       = 256
+  distance_metric = "euclidean"
+}
+
+resource "aws_bedrockagent_knowledge_base" "example" {
+  name     = "example-s3vectors-kb"
+  role_arn = aws_iam_role.example.arn
+
+  knowledge_base_configuration {
+    vector_knowledge_base_configuration {
+      embedding_model_arn = "arn:aws:bedrock:us-west-2::foundation-model/amazon.titan-embed-text-v2:0"
+      embedding_model_configuration {
+        bedrock_embedding_model_configuration {
+          dimensions          = 256
+          embedding_data_type = "FLOAT32"
+        }
+      }
+    }
+    type = "VECTOR"
+  }
+
+  storage_configuration {
+    type = "S3_VECTORS"
+    s3_vectors_configuration {
+      index_arn = aws_s3vectors_index.example.index_arn
+    }
+  }
+}
+```
+
 ## Argument Reference
 
 The following arguments are required:
@@ -149,11 +191,12 @@ The `s3_location` configuration block supports the following arguments:
 
 The `storage_configuration` configuration block supports the following arguments:
 
-* `type` - (Required) Vector store service in which the knowledge base is stored. Valid Values: `OPENSEARCH_SERVERLESS`, `PINECONE`, `REDIS_ENTERPRISE_CLOUD`, `RDS`.
+* `type` - (Required) Vector store service in which the knowledge base is stored. Valid Values: `OPENSEARCH_SERVERLESS`, `PINECONE`, `REDIS_ENTERPRISE_CLOUD`, `RDS`, `S3_VECTORS`.
 * `opensearch_serverless_configuration` - (Optional) The storage configuration of the knowledge base in Amazon OpenSearch Service. See [`opensearch_serverless_configuration` block](#opensearch_serverless_configuration-block) for details.
 * `pinecone_configuration` - (Optional)  The storage configuration of the knowledge base in Pinecone. See [`pinecone_configuration` block](#pinecone_configuration-block) for details.
 * `rds_configuration` - (Optional) Details about the storage configuration of the knowledge base in Amazon RDS. For more information, see [Create a vector index in Amazon RDS](https://docs.aws.amazon.com/bedrock/latest/userguide/knowledge-base-setup.html). See [`rds_configuration` block](#rds_configuration-block) for details.
 * `redis_enterprise_cloud_configuration` - (Optional) The storage configuration of the knowledge base in Redis Enterprise Cloud. See [`redis_enterprise_cloud_configuration` block](#redis_enterprise_cloud_configuration-block) for details.
+* `s3_vectors_configuration` - (Optional) The storage configuration of the knowledge base in Amazon S3 Vectors. See [`s3_vectors_configuration` block](#s3_vectors_configuration-block) for details.
 
 ### `opensearch_serverless_configuration` block
 
@@ -204,6 +247,15 @@ The `redis_enterprise_cloud_configuration` configuration block supports the foll
     * `vector_field` - (Required) Name of the field in which Amazon Bedrock stores the vector embeddings for your data sources.
 * `vector_index_name` - (Required) Name of the vector index.
 
+### `s3_vectors_configuration` block
+
+The `s3_vectors_configuration` configuration block supports the following arguments.
+Either `index_arn`, or both `index_name` and `vector_bucket_arn` must be specified.
+
+* `index_arn` - (Optional) ARN of the S3 Vectors index. Conflicts with `index_name` and `vector_bucket_arn`.
+* `index_name` - (Optional) Name of the S3 Vectors index. Must be specified with `vector_bucket_arn`. Conflicts with `index_arn`.
+* `vector_bucket_arn` - (Optional) ARN of the S3 Vectors vector bucket. Must be specified with `index_name`. Conflicts with `index_arn`.
+
 ## Attribute Reference
 
 This resource exports the following attributes in addition to the arguments above: