Added/updated snippets for docs (#2318)

docs/doc_examples/fc26f51bb22c0b5270a66b4722f18aa7.asciidoc

@@ -0,0 +1,22 @@
+// 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.ilm.putLifecycle({
+  name: "my_policy",
+  policy: {
+    phases: {
+      warm: {
+        actions: {
+          allocate: {
+            number_of_replicas: 2,
+            total_shards_per_node: 200,
+          },
+        },
+      },
+    },
+  },
+});
+console.log(response);
+----