adding min score and availability annotation for retriever

Author: pmpailis

output/openapi/elasticsearch-openapi.json

@@ -428,7 +428,7 @@ export interface Request extends RequestBase {
     rescore?: Rescore | Rescore[]
     /**
      * A retriever is a specification to describe top documents returned from a search. A retriever replaces other elements of the search API that also return top documents such as query and knn.
-     * @availability stack since=8.14.0
+     * @availability stack since=8.14.0 stability=stable
      * @availability serverless
      */
     retriever?: RetrieverContainer

output/openapi/elasticsearch-serverless-openapi.json

@@ -40,6 +40,8 @@ export class RetrieverContainer {
 export class RetrieverBase {
   /** Query to filter the documents that can match. */
   filter?: QueryContainer | QueryContainer[]
+  /** Minimum _score for matching documents. Documents with a lower _score are not included in the top documents. */
+  min_score?: float
 }
 
 export class StandardRetriever extends RetrieverBase {
@@ -51,8 +53,6 @@ export class StandardRetriever extends RetrieverBase {
   terminate_after?: integer
   /** A sort object that that specifies the order of matching documents. */
   sort?: Sort
-  /** Minimum _score for matching documents. Documents with a lower _score are not included in the top documents. */
-  min_score?: float
   /** Collapses the top documents by a specified key into a single top document per key. */
   collapse?: FieldCollapse
 }