Added/updated snippets for docs (#2318)

docs/doc_examples/64d24f4b2a57dba48092dafe3eb68ad1.asciidoc

@@ -0,0 +1,20 @@
+// 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.mget({
+  index: "test",
+  stored_fields: "field1,field2",
+  docs: [
+    {
+      _id: "1",
+    },
+    {
+      _id: "2",
+      stored_fields: ["field3", "field4"],
+    },
+  ],
+});
+console.log(response);
+----