[docs]: appsync/datasource: add missing documentation (#32443)

* aws_appsync_datasource: format doc headings and links

* aws_appsync_datasource: document additional attributes

website/docs/r/appsync_datasource.html.markdown

@@ -81,78 +81,86 @@ The following arguments are supported:
 * `name` - (Required) User-supplied name for the data source.
 * `type` - (Required) Type of the Data Source. Valid values: `AWS_LAMBDA`, `AMAZON_DYNAMODB`, `AMAZON_ELASTICSEARCH`, `HTTP`, `NONE`, `RELATIONAL_DATABASE`, `AMAZON_EVENTBRIDGE`.
 * `description` - (Optional) Description of the data source.
-* `dynamodb_config` - (Optional) DynamoDB settings. See [below](#dynamodb_config)
-* `elasticsearch_config` - (Optional) Amazon Elasticsearch settings. See [below](#elasticsearch_config)
-* `event_bridge_config` - (Optional) AWS EventBridge settings. See [below](#event_bridge_config)
-* `http_config` - (Optional) HTTP settings. See [below](#http_config)
-* `lambda_config` - (Optional) AWS Lambda settings. See [below](#lambda_config)
-* `opensearchservice_config` - (Optional) Amazon OpenSearch Service settings. See [below](#opensearchservice_config)
-* `relational_database_config` (Optional) AWS RDS settings. See [Relational Database Config](#relational_database_config)
+* `dynamodb_config` - (Optional) DynamoDB settings. See [DynamoDB Config](#dynamodb-config)
+* `elasticsearch_config` - (Optional) Amazon Elasticsearch settings. See [ElasticSearch Config](#elasticsearch-config)
+* `event_bridge_config` - (Optional) AWS EventBridge settings. See [Event Bridge Config](#event-bridge-config)
+* `http_config` - (Optional) HTTP settings. See [HTTP Config](#http-config)
+* `lambda_config` - (Optional) AWS Lambda settings. See [Lambda Config](#lambda-config)
+* `opensearchservice_config` - (Optional) Amazon OpenSearch Service settings. See [OpenSearch Service Config](#opensearch-service-config)
+* `relational_database_config` (Optional) AWS RDS settings. See [Relational Database Config](#relational-database-config)
 * `service_role_arn` - (Optional) IAM service role ARN for the data source.
 
-### dynamodb_config
+### DynamoDB Config
 
 The following arguments are supported:
 
 * `table_name` - (Required) Name of the DynamoDB table.
 * `region` - (Optional) AWS region of the DynamoDB table. Defaults to current region.
 * `use_caller_credentials` - (Optional) Set to `true` to use Amazon Cognito credentials with this data source.
+* `delta_sync_config` - (Optional) The DeltaSyncConfig for a versioned data source. See [Delta Sync Config](#delta-sync-config)
+* `versioned` - (Optional) Detects Conflict Detection and Resolution with this data source.
 
-### elasticsearch_config
+### Delta Sync Config
+
+* `base_table_ttl` - (Optional) The number of minutes that an Item is stored in the data source.
+* `delta_sync_table_name` - (Required) The table name.
+* `delta_sync_table_ttl` - (Optional) The number of minutes that a Delta Sync log entry is stored in the Delta Sync table.
+
+### ElasticSearch Config
 
 The following arguments are supported:
 
 * `endpoint` - (Required) HTTP endpoint of the Elasticsearch domain.
 * `region` - (Optional) AWS region of Elasticsearch domain. Defaults to current region.
 
-### event_bridge_config
+### Event Bridge Config
 
 The following arguments are supported:
 
 * `event_bus_arn` - (Required) ARN for the EventBridge bus.
 
-### http_config
+### HTTP Config
 
 The following arguments are supported:
 
 * `endpoint` - (Required) HTTP URL.
-* `authorization_config` - (Optional) Authorization configuration in case the HTTP endpoint requires authorization. See [Authorization Config](#authorization_config).
+* `authorization_config` - (Optional) Authorization configuration in case the HTTP endpoint requires authorization. See [Authorization Config](#authorization-config).
 
-#### authorization_config
+#### Authorization Config
 
 The following arguments are supported:
 
 * `authorization_type` - (Optional) Authorization type that the HTTP endpoint requires. Default values is `AWS_IAM`.
-* `aws_iam_config` - (Optional) Identity and Access Management (IAM) settings. See [AWS IAM Config](#aws_iam_config).
+* `aws_iam_config` - (Optional) Identity and Access Management (IAM) settings. See [AWS IAM Config](#aws-iam-config).
 
-##### aws_iam_config
+##### AWS IAM Config
 
 The following arguments are supported:
 
 * `signing_region` - (Optional) Signing Amazon Web Services Region for IAM authorization.
 * `signing_service_name`- (Optional) Signing service name for IAM authorization.
 
-### lambda_config
+### Lambda Config
 
 The following arguments are supported:
 
 * `function_arn` - (Required) ARN for the Lambda function.
 
-### opensearchservice_config
+### OpenSearch Service Config
 
 The following arguments are supported:
 
 * `endpoint` - (Required) HTTP endpoint of the OpenSearch domain.
 * `region` - (Optional) AWS region of the OpenSearch domain. Defaults to current region.
 
-### relational_database_config
+### Relational Database Config
 
 The following arguments are supported:
 
-* `http_endpoint_config` - (Required) Amazon RDS HTTP endpoint configuration. See [HTTP Endpoint Config](#http_endpoint_config).
+* `http_endpoint_config` - (Required) Amazon RDS HTTP endpoint configuration. See [HTTP Endpoint Config](#http-endpoint-config).
 * `source_type` - (Optional) Source type for the relational database. Valid values: `RDS_HTTP_ENDPOINT`.
 
-#### http_endpoint_config
+#### HTTP Endpoint Config
 
 The following arguments are supported: