Added/updated snippets for docs (#2318)

docs/doc_examples/23c4ae62f7035f2796e0ac3c7c4c20a9.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: {
+          migrate: {},
+          allocate: {
+            number_of_replicas: 1,
+          },
+        },
+      },
+    },
+  },
+});
+console.log(response);
+----