Regenerate docs

docs/data-sources/elasticsearch_ingest_processor_append.md

@@ -48,7 +48,7 @@ resource "elasticstack_elasticsearch_ingest_pipeline" "my_ingest_pipeline" {
 - **description** (String) Description of the processor.
 - **if** (String) Conditionally execute the processor
 - **ignore_failure** (Boolean) Ignore failures for the processor.
-- **media_type** (String) The media type for encoding value. Applies only when value is a template snippet. Must be one of `application/json`, `text/plain`, or `application/x-www-form-urlencoded`.
+- **media_type** (String) The media type for encoding value. Applies only when value is a template snippet. Must be one of `application/json`, `text/plain`, or `application/x-www-form-urlencoded`. Supported only from Elasticsearch version **7.15**.
 - **on_failure** (List of String) Handle failures for the processor.
 - **tag** (String) Identifier for the processor.