Added/updated snippets for docs (#2318)

docs/doc_examples/774bfde8793dc4927f7cad2dd91c5b5f.asciidoc

@@ -0,0 +1,28 @@
+// 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.msearchTemplate({
+  index: "my-index",
+  search_templates: [
+    {},
+    {
+      id: "my-search-template",
+      params: {
+        query_string: "hello world",
+        from: 0,
+        size: 10,
+      },
+    },
+    {},
+    {
+      id: "my-other-search-template",
+      params: {
+        query_type: "match_all",
+      },
+    },
+  ],
+});
+console.log(response);
+----