Added/updated snippets for docs (#2318)

docs/doc_examples/9bae72e974bdeb56007d9104e73eff92.asciidoc

@@ -0,0 +1,12 @@
+// 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.update({
+  index: "test",
+  id: 1,
+  script: "ctx._source.remove('new_field')",
+});
+console.log(response);
+----