add availability info to index.dense_vector.hnsw_early_termination (#131730)

Author: shainaraskas

docs/reference/elasticsearch/index-settings/index-modules.md

@@ -267,5 +267,5 @@ $$$index-esql-stored-fields-sequential-proportion$$$
 `index.esql.stored_fields_sequential_proportion`
 :   Tuning parameter for deciding when {{esql}} will load [Stored fields](/reference/elasticsearch/rest-apis/retrieve-selected-fields.md#stored-fields) using a strategy tuned for loading dense sequence of documents. Allows values between 0.0 and 1.0 and defaults to 0.2. Indices with documents smaller than 10kb may see speed improvements loading `text` fields by setting this lower.
 
-$$$index-dense-vector-hnsw-early-termination$$$ `index.dense_vector.hnsw_early_termination`
+$$$index-dense-vector-hnsw-early-termination$$$ `index.dense_vector.hnsw_early_termination` {applies_to}`stack: ga 9.2` {applies_to}`serverless: all`
 :   Whether to apply _patience_ based early termination strategy to knn queries over HNSW graphs (see [paper](https://cs.uwaterloo.ca/~jimmylin/publications/Teofili_Lin_ECIR2025.pdf)). This is only applicable to `dense_vector` fields with `hnsw`, `int8_hnsw`, `int4_hnsw` and `bbq_hnsw` index types. Defaults to `false`.