Added/updated snippets for docs (#2318)

docs/doc_examples/643e19c3b6ac1134554dd890e2249c2b.asciidoc

@@ -0,0 +1,18 @@
+// 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.indices.putIndexTemplate({
+  name: "my-index-template",
+  index_patterns: ["logs-*"],
+  data_stream: {},
+  template: {
+    settings: {
+      "index.mode": "logsdb",
+    },
+  },
+  priority: 101,
+});
+console.log(response);
+----