Added/updated snippets for docs (#2318)

docs/doc_examples/2bc57cd3f32b59b0b44ca63b19cdfcc0.asciidoc

@@ -0,0 +1,24 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.search({
+  index: "image-index",
+  knn: {
+    field: "image-vector",
+    query_vector: [1, 5, -20],
+    k: 5,
+    num_candidates: 50,
+    similarity: 36,
+    filter: {
+      term: {
+        "file-type": "png",
+      },
+    },
+  },
+  fields: ["title"],
+  _source: false,
+});
+console.log(response);
+----