Added/updated snippets for docs (#2318)

docs/doc_examples/930a3c5667e3bf47b4e8cc28e7bf8d5f.asciidoc

@@ -0,0 +1,29 @@
+// 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.security.putRole({
+  name: "my_admin_role",
+  refresh: "true",
+  cluster: ["manage"],
+  indices: [
+    {
+      names: ["index1", "index2"],
+      privileges: ["manage"],
+    },
+  ],
+  applications: [
+    {
+      application: "myapp",
+      privileges: ["admin", "read"],
+      resources: ["*"],
+    },
+  ],
+  run_as: ["analyst_user"],
+  metadata: {
+    version: 1,
+  },
+});
+console.log(response);
+----